Formulation And Development Of Diclofenac Topical Emulgels

Formulation And Development Of Diclofenac Topical Emulgels | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Formulation And Development Of Diclofenac Topical Emulgels Souravh Jha, Pinky Singh, Kanchan Yadav, Arti Rai, Neetu Saket, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4366526/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Benzimidazoles are an important class of compounds with a wide spectrum of biological activity ranging from anti-hypertensive, antiviral, anti-fungal, antitumor and anthelmintic activity. Benzimidazole rings are the most important nitrogen-containing heterocycles, which are widely explored and utilized by the pharmaceutical industry for drug discovery. Due to their special structural features and electron-rich environment, Benzimidazole containing drugs bind to a variety of therapeutic targets, thereby exhibiting a broad spectrum of bioactivities. Numerous benzimidazole based drugs have been extensively used in the clinic to treat various types of diseases with high therapeutic potential. A series of benzimidazole derivatives were synthesized by a single step process by reacting o-phenylenediamine and benzoic acid. The purity and structure confirmation of the synthesized compounds were done by TLC and 1 HNMR. The compounds were evaluated for anti-microbial, anti-fungal and antioxidant activity. Diclofenac TLC Triethanolamine INTRODUCTION Topical drug delivery system has been the most appropriate and convenient approach over the past two decades. Many conventional semisolid dosage forms such as creams, gels, and lotions found to have problems such as sticky in nature, lesser spreading coefficient, and stability issues.[1] To overcome such issues, a novel, stable topical drug delivery approach can be used to formulate successful drug delivery for hydrophobic drugs. In recent years, the concept of emulgel has gained significant interest in the topical drug delivery system.[2] An emulgel is a combination of emulsion and gel system, which is formulated by mixing emulsion either o/w or w/o with a gelling agent.[3] Emulgel provides several benefits such as better loading capacity, stability, controlled release, improved patient compliance, avoids first pass metabolism, and gastric complications.[4,5] In the present investigation, a model anti-inflammatory drug Diclofenac was chosen since its oral dosage form has demerits such as first pass metabolism, gastric ulcerogenic effects, and metabolic degradation.[6] Diclofenac even though available in conventional gel form since it is a hydrophobic drug formulating it in emulgel makes it more fruitful way to deliver through the skin.[7] Percutaneous absorption of drugs from topical formulation involves the release of the drug from the formulation and permeation through skin to reach the target tissue. The release of the drug from topical preparations depends on the physicochemical properties of the vehicle and the drug employed. In order to enhance drug and skin permeation, methods such as the selection of suitable vehicle, co-administration of a chemical enhancer have been studied. Use of topical agents requires an appreciation of the factors that influence percutaneous absorption. Molecules can penetrate the skin by three routes, through intact stratum corneum, through sweat glands, or through the sebaceous follicle. The surface of the stratum corneum presents more than 99% of the total skin surface available for percutaneous drug absorption1. Passage through this outermost layer is the rate –limiting step for percutaneous absorption. The major steps involved in percutaneous absorption include the establishment of a concentration gradient ,which provides the driving force for drug movement a across the skin ,release of drug from the vehicle (penetration co-efficient);and drug diffusion across the layers of the skin(diffusion co-efficient).preferable characteristic of topical drugs include low molecular mass (600 Daltons),with adequate solubility in oil & water ,and have high partition co-efficient for the topical formulation. Gels are a relatively newer class of dosage form created by entrapment of large amounts of aqueous or hydro alcoholic liquid in a network of colloidal solid particles.gel formulations generally provide faster drug release compared with ointments and creams. Major drawback of topical dosage form diffusion of drug in the delivery of hydrophobic drugs, and permeation through stratum corneum is for hydrophilic drugs. Therefore, to overcome this limitation emulgels are prepared. Aim: The present research work was aimed to develop a novel emulgel for Diclofenac to enhance the drug absorption by the topical application, which overcomes the demerits of oral dosage form and conventional gel system of Diclofenac. Methodology Preparation of Diclofenac emulgel The gel phase and emulsion phase were prepared separately. First, the gel phase was prepared by dispersing the different concentrations of carbopol 934 in distilled water and mixed by a mechanical stirrer. The emulsion phases were prepared by the addition of varying amounts of span 20 in varying quantities of liquid paraffin followed by mechanical stirring. The aqueous phase of emulgel was prepared by incorporating tween 20 in distilled water with continuous stirring, then methyl and propylparaben were added in propylene glycol, and Diclofenac (0.5 g) was dissolved in ethanol, and both the solutions were mixed with water phase of the emulsion. Both the water and oil phases were heated at 70–80°C for 20 min. Later, the oily phase was added to the aqueous phase by gentle stirring and allowed to cool. Finally, the prepared emulsion was mixed with gel base in a 1:1 ratio by manual stirring to get a clear emulgel of Diclofenac. The pH of all the prepared emulgels was adjusted by dropwise addition of Triethanolamine.[8-10] A quantity of 100 g of Diclofenac was prepared for all the six formulations and the formulation composition of Diclofenac emulgels is shown in Table . Evaluation of emulgels Drug-polymer compatibility by Fourier transforms infrared (FTIR) study This study was carried out by FTIR spectroscopy to verify whether the drug and polymer are compatible with one another or not. It was evaluated by obtaining the IR spectral data of Diclofenac and physical mixture of Diclofenac with carbopol 934 using ATR-Bruker FTIR spectrophotometer. The interaction study was concluded from the interpretation of IR spectra. Appearance : All the formulated Diclofenac emulgels were visually inspected for color, clarity, and homogeneity. Ph : The pH of all the formulated emulgels was measured by digital pH meter. Rheological study : The viscosity of the emulgels was measured by Brookfield viscometer with “T” bar spindle at 5 rpm at a temperature of 25±2°C and the viscosity was recorded in cps.[14] Spreadability : An ideal topical gel should possess a sufficient spreading coefficient when applied or rubbed on the skin surface. This was evaluated by placing about 1 g of formulation on a glass slide. Another glass slide of the same length was placed above that, and a mass of 500 g was put on the glass slide so that the gel gets sandwiched between the two glass slides and spreads at a certain distance.[15] The time taken for the gel to travel the distance from the place of its position was noted down. Spreadability was determined by the following formula. Where, S-Spreadability, g.cm/s M-Weight put on the upper glass L-Length of glass slide T-Time for spreading gel in sec Swelling index : It was measured by placing 1 g of formulation in a porous aluminum foil and was placed in a 50 ml beaker containing 10 ml of 0.1 N sodium hydroxide. The samples were removed from beakers at different time intervals and put on the dry place for some time and reweighed.The swelling index of emulgels was calculated using the following formula. Table 1: Formulation design of Diclofenac emulgels Ingredients Formulation code AG-1 AG-2 AG-3 AG-4 AG-5 AG-6 Diclofenac 0.5 g 0.5 g 0.5 g 0.5 g 0.5 g 0.5 g Carbopol 934 0.50% 1% 1.50% 2% 2.50% 3% Liquid Paraffin 5 ml 5 ml 8 ml 8 ml 10 ml 10 ml Span 20 0.20% 0.50% 0.20% 0.50% 0.20% 0.50% Tween 20 0.20% 0.50% 0.20% 0.50% 0.20% 0.50% Methylparaben 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Propylparaben 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Ethanol 5 ml 5 ml 5 ml 5 ml 5 ml 5 ml Distilled water q.s q.s q.s q.s q.s q.s Triethanolamine q.s to adjust pH q.s to adjust pH q.s to adjust pH q.s to adjust pH q.s to adjust pH q.s to adjust pH Swelling index (SW) % = [(Wt-Wo)]/Wo × 100 Where, (SW) % = Equilibrium percent swelling Wt = Weight of swollen emulgel after time t, Wo = Weight of emulgel before swelling at zero time, t. In vitro Drug release study Release study of the emulgels was performed using modified Franz diffusion six cell apparatus which has donor and receptor compartment with a linear end for the solution withdrawal. A dialysis membrane, which was soaked overnight in phosphate buffer pH 7.4, was tied on the upper surface of the donor compartment. An amount of 12 ml of freshly prepared phosphate buffer pH 7.4 was put in receptor chamber. The dialysis membrane was sandwiched between the donor and receptor compartment. A magnetic bead was placed inside the receptor compartment by operating at 50 rpm and the apparatus assembly was maintained at 37±0.5°C. 500 mg of emulgel was placed on the dialysis membrane, which was mounted on the donor compartment. Aliquots of 1 ml were withdrawn at time intervals of every 30 min and diluted to 10 ml with phosphate buffer pH 7.4. The study was done for a time period of 6 h. All the solutions were scanned at 275 nm using UV Spectrophotometer. The amount of drug released was estimated, and the percentage cumulative drug release of the emulgels was calculated. Particle size analysis This study was done for optimized formulation of Diclofenac emulgel. The procedure involves dilution of 1 g of emulgel with distilled water which was observed under high resolution Biovis Particle Size Analyzer and the average size of the particles were measured in microns. In vitro skin irritation study For checking the skin irritation, an in vitro OECD recommended test was used known as Hen’s Embryo Test-Chorioallantoic Membrane (HET-CAM test). In this method, hen eggs which are freshly layed were used and were embroyonated to check the irritation on the developed chick embryo. Three groups were made, each containing three eggs. Negative control: Here, the eggs were treated with 0.9% NaCl as a standard. Test group: In this group, eggs were tested with the optimized formulation. Positive control: In this, eggs were treated with 1% SDS (Sodium dodecyl sulfate) as an irritant for comparison with negative control and test. Methods The collected hen’s eggs were placed on a metal tray which was kept in an incubator at temperature of 37±0.5 °C and relative humidity of 58±2°C required for the embryo development in the eggs. During incubation, the eggs were hand rotated 5 times in a day and this process was continued for 8 days. On 8th day, the incubated eggs were observed for the embryo growth and after confirmation the eggs were placed back to the incubator. On 9th day, the eggs were removed from the incubator and on the top surface; hole was drilled on the air sac of egg shell without harming the embryo. After making the hole, all the groped eggs were treated with respective solutions and observed for the signs of hemorrhage, coagulation, and lysis of blood vessels for a time period of 300 s (5 min). The irritation effect was confirmed by getting the mean irritation score from the formula. The irritation score (IS) formula is given below, followed by irritation score value with inference in table. (301-H) (301- L) (301-C) IS = ×5 + ×7 + ×9 300 300 300 Where, H-Hemorrhage. L-Lysis of blood vessels. C-Coagulation. Result and Discussion 1. Physical Appearance: All the Diclofenac emulgels formulations were found to be homogenous and showed no clogging and lumps which indicate good texture of system. All formulation batches were found to be homogenous yellowish milky emulsions previously while emulgels were found to be whitish viscous creamy preparation. 2. pH : The pH of all the formulations was ranging in between 6.1-6.5 which is comparable to the human skin pH which is around . Table 2: pH of the formulations Formulations pH Mean(n=3) F1 6.3 6.5 6.0 6.2 F2 6.7 6.1 6.4 6.4 F3 6.1 6.3 5.9 6.1 F4 6.5 5.9 6.2 6.2 F5 6.4 6.7 6.1 6.4 F6 6.8 6.3 6.4 6.5 F7 6.6 6.1 6.3 6.3 F8 6.6 6.0 6.4 6.2 3. Spreadability: Emulgel is considered to be good if it takes minimum time to spread on the surface. Among the various gels studied F3 emulgel has better spreadability. The values of spreadability indicate that the gel is easily spreadable by small amount of shear. Table 3: Spreadability of the Formulations Formulations Time (sec.) Mean(n=3) F1 12 13 15 13 F2 14 12 11 12 F3 10 11 13 11 F4 11 13 12 12 F5 16 14 15 15 F6 15 17 13 15 F7 13 16 15 14 F8 18 16 15 16 4. Extrudability Study: The values of extrudability of different formulations were range in between 13-18 seconds it indicates that all the formulation were easily extruded out. Table 4: Extrudability study of formulations Formulations Time (sec.) Mean(n=3) F1 14 18 17 16 F2 13 15 16 14 F3 13 12 15 13 F4 18 16 19 17 F5 15 19 18 17 F6 16 20 19 18 F7 18 17 21 18 F8 16 15 19 16 5. Rheological Study: The viscosity of the formulations were studied at the 100 rpm of spindle no. 4 at 37ᵒC. Table 5: Rheological study of formulations Formulations Viscosity (cPs) Mean(n=3) F1 1252 1089 1467 1269 F2 1029 1287 1445 1253 F3 955 1189 1076 1073 F4 1023 1187 1654 1288 F5 1286 1837 1342 1488 F6 1314 1764 1456 1511 F7 1048 1421 983 1150 F8 1363 1678 1710 1583 6. Drug diffusion study: Different formulations were taken at the various time intervals and were measured by using UV Shimadzu 1800 at 275nm. wavelength. Table 6: % Drug diffusion of formulations Formulations % Drug diffusion F1 94.3 F2 87.6 F3 96.9 F4 93.3 F5 97.4 F6 98.5 F7 95.1 F8 91.3 7. In-vitro drug release kinetics: Drug release of the different formulations were checked at the interval of 1 hour upto 12 hours it was found better in the F3 and F6 formulations. Table 7: Drug release kinetics of different formulations Time (hrs.) F1 F2 F3 F4 F5 F6 F7 F8 0 0 0 0 0 0 0 0 0 1 5.17 4.10 5.56 5.76 3.94 8.80 4.10 5.18 2 12.02 7.25 13.61 7.51 6.15 16.51 7.25 7.93 3 16.54 10.93 21.25 11.05 9.37 29.72 10.93 12.45 4 25.16 12.28 32.13 16.54 11.20 38.64 12.28 17.62 5 33.47 23.68 39.58 25.93 22.46 47.38 23.68 26.01 6 41.31 28.41 46.40 30.24 25.34 55.13 28.41 32.85 7 49.67 33.06 51.79 38.85 29.81 63.02 33.06 42.65 8 58.46 37.12 62.83 40.69 34.65 70.61 37.12 46.42 9 60.02 42.62 68.32 45.65 40.65 83.45 42.62 49.83 10 68.32 49.53 74.82 52.25 46.74 77.54 49.53 52.64 11 74.60 53.62 81.25 55.48 50.15 90.05 53.62 57.45 12 76.77 60.31 89.53 63.42 58.09 98.86 60.31 62.06 Discussion The future of pharmaceutical products will be rush up with topical delivery products because of drawbacks in oral, parenteral and other routes and more patient compliance.Loading of hydrophobic drug in hydrophilic gel matrix was found a solution by emulgel. Emulgel possess excellent bioadhesion, viscosity and long term stability which will increase compliance. In this study emulgels were prepared by using two different gel forming polymers in which the gel formulation with Carbomer 934 showed better clarity and stability for longer period of time. Conclusion In this study emulgels were prepared by using two different gel forming polymers in which the gel formulation with Carbomer 934 showed better clarity and stability for longer period of time. In the study it was observed that the concentration of tween80 and linseed oil have shown effect on viscosity, spreadability and in-vitro drug permeability.In terms of pH the observed value of all the formulations were comparable to human skin pH. All the formulation were found to be easily spreadable. In drug permeation study and drug release data showed that F6 formulation showed better drug release data compared to other formulations. So it is considered as the optimized batch. Hence, Diclofenac emulgel was successfully prepared and evaluated. Declarations The IAEC of Truba Institute of Pharmacy has approved this study References Rachit Khullar, emulgels: a surrogate approach for topically used hydrophobic drugs- International journal of pharmacy and biological sciences- 2011, 117-128 Kaisar Raza, topical delivery of Diclofenac: challenges and promises of novel drug delivery system- Biomed research journal – 2014, 406731 Ashara Kalpesh C - Emulgel: a no refusable formulation to improve solubility, penetration and percentage of Diclofenac release for suppressing PGE2 synthesis- British Biomedical Bulletin-2014, 2347-5447 . Debjit Bhowmik - The pharma innovation recent advances in novel topical drug delivery system- The pharma journal- 2012, 2277-7965. Ashni Verma - Topical gels as drug delivery system: A review-International journal of pharma sceinces and research- 2013, (374-382) Rachit Khullar - Emulgels: A surrogate approach for topically used hydrophobic drugs- International journal of pharmacy and biosciences - 2012, (117-12) K.P.Mohammed Haneefa - Emulgel: An advanced review- Journal of pharmaceutical sciences and research – 2013, (254-258) A.S.Panwar - Emulgel: A Review, Asian journal of pharmacy and life sciences, , (2011). Diclofenac- https://www.drugbank.ca/ drugs/DB06736 Noh K, absolute bioavailability and metabolism of Diclofenac in rats- Arch pharm- 2015, 68-72. Burkhard Hinz, Diclofenac spares cox-1 as a result of limited but sustained biotransformation to diclofenac- clinical pharmacology& therapeutics- 2003, 222-235. Dr. Mansij Biswas, Topical route of administartion and dosage forms, slide share. N.S.Chandrasekhar, Physicochemical and pharamcokinetic parameter in drug selection and loading for transdermal drug delivery- Indian journal of pharmaceutical science-2008, 94-96. Shakeel F Ramadan, Solubilityand dissolution improvement of Diclofenac using different nanocarriers- J bioeuivalance availab -2009, 039-043. Drug Index- www.drugsupdate.com/ genric/view/5/Diclofenac Drug Update- www.drugsupdate.com/ brand/showavailablebrands/5/17 Diclofenac – 2018 https://en.m.wiki-pedia.org/wiki/acecloofenac CAS registry number https://en.m.wikipedia.org/wiki/CAS_Registry_Number Arun Gokul T.S, Formulation and Optimization of Diclofenac gel- Research in Pharmacy- 2013, 14-22. Pottalaswathi, Formulation and evaluation of Diclofenac topical emulgel- IJAPSIRD, 2015(0052-0057). Snehal P. Mulye, Formulation development and evaluation of Indomethacin emulgel- Pelagia Research Library, 2013,4(5):31-45 Rajesh Katara, Diclofenac oil Drops: Characterization and evaluation against ocular inflammation- Pharmaceutical Development and Technology,2017- 1097-9867. Aijaz A. Sheikh, Formulation development and characterization of Diclofenac gel conatining linseed oil and ginger oleoresin-IJPTR, 2011-(1448-1453). P C Sathya Keerthi Pani, Emulgel: A novel for enhancing topical delivery of Diclofenac- Inventi Rapid: NDDS Vol. 2015-(0976-3791). Additional Declarations The authors declare potential competing interests as follows: .. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4366526","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":298582711,"identity":"9001f850-4def-4622-9ce7-9c5f1df0603b","order_by":0,"name":"Souravh Jha","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA+0lEQVRIiWNgGAWjYPCCA0CckMbAUAGkmZkbSNFyBqSFkXgtbAyMbSAOAS3y7T1mH3623ZE3Z0949uDnvNpo/naglh8V23BqMThzxnhmb9szw509D9INe7cdz51xmLGBsefMbdxaJHKMGXjOHGbccCMhTYJ327HcBqAWZsY23FrkZ+QYM/45c9gepEXy75xjufMJaWG4kWPMzFNxOBGkRZq3oSZ3AyEtBmeOFTPLVBxO3nDmQZq0zLEDuRuBWg7i84t8e/NmxjcGh203HM9Jk3xTU5c77/zhgw9+VOBxGALwJACJw2DmAWLUAwE7SGEdkYpHwSgYBaNgJAEAgX9jMG6ziwgAAAAASUVORK5CYII=","orcid":"https://orcid.org/0009-0008-2437-3326","institution":"","correspondingAuthor":true,"prefix":"","firstName":"Souravh","middleName":"","lastName":"Jha","suffix":""},{"id":298582712,"identity":"a5eb149f-c979-42b2-bbbc-073252fd5257","order_by":1,"name":"Pinky Singh","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Pinky","middleName":"","lastName":"Singh","suffix":""},{"id":298582713,"identity":"bf627aac-9f8a-4e36-b162-269699a836b7","order_by":2,"name":"Kanchan Yadav","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Kanchan","middleName":"","lastName":"Yadav","suffix":""},{"id":298582714,"identity":"42a615f7-3084-4acb-a1ad-28e307e7e6df","order_by":3,"name":"Arti Rai","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Arti","middleName":"","lastName":"Rai","suffix":""},{"id":298582715,"identity":"afd0ab73-f8bd-40be-8c2c-45efbf082efb","order_by":4,"name":"Neetu Saket","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Neetu","middleName":"","lastName":"Saket","suffix":""},{"id":298582716,"identity":"8e7ab6a6-d7a6-47ed-8e3f-bb430f0923a6","order_by":5,"name":"Manju Chouhan","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Manju","middleName":"","lastName":"Chouhan","suffix":""}],"badges":[],"createdAt":"2024-05-04 03:42:23","currentVersionCode":1,"declarations":{"humanSubjects":false,"vertebrateSubjects":false,"conflictsOfInterestStatement":true,"humanSubjectEthicalGuidelines":false,"humanSubjectConsent":false,"humanSubjectClinicalTrial":false,"humanSubjectCaseReport":false,"vertebrateSubjectEthicalGuidelines":false},"doi":"10.21203/rs.3.rs-4366526/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4366526/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":56226974,"identity":"6d8c2d6d-e238-4308-b028-4068fb1bcc25","added_by":"auto","created_at":"2024-05-10 06:20:59","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":604558,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4366526/v1/1ba70f54-c1a7-4497-a4e4-c181a3df0577.pdf"}],"financialInterests":"The authors declare potential competing interests as follows: ..","formattedTitle":"\u003cp\u003e\u003cstrong\u003eFormulation And Development Of Diclofenac Topical Emulgels\u003c/strong\u003e\u003c/p\u003e","fulltext":[{"header":"INTRODUCTION","content":"\u003cp\u003eTopical drug delivery system has been the most appropriate and convenient approach over the past two decades. Many conventional semisolid dosage forms such as creams, gels, and lotions found to have problems such as sticky in nature, lesser spreading coefficient, and stability issues.[1]\u0026nbsp;To overcome such issues, a novel, stable topical drug delivery approach can be used to formulate successful drug delivery for hydrophobic drugs. In recent years, the concept of emulgel has gained significant interest in the topical drug delivery system.[2]\u0026nbsp;An emulgel is a combination of emulsion and gel system, which is formulated by mixing emulsion either o/w or w/o with a gelling agent.[3]\u0026nbsp;Emulgel provides several benefits such as better loading capacity, stability, controlled release, improved patient compliance, avoids first pass metabolism, and gastric complications.[4,5]\u0026nbsp;In the present investigation, a model anti-inflammatory drug Diclofenac was chosen\u0026nbsp;since its oral dosage form has demerits such as first pass metabolism, gastric ulcerogenic effects, and metabolic degradation.[6] Diclofenac even though available in conventional gel form since it is a hydrophobic drug formulating it in emulgel makes it more fruitful way to deliver through the skin.[7] Percutaneous absorption of drugs from topical formulation involves the release of the drug from the formulation and permeation through skin to reach the target tissue. The release of the drug from topical preparations depends on the physicochemical properties of the vehicle and the drug employed. In order to enhance drug and skin permeation, methods such as the selection of suitable vehicle, co-administration of a chemical enhancer have been studied. Use of topical agents requires an appreciation of the factors that influence percutaneous absorption. Molecules can penetrate the skin by three routes, through intact stratum corneum, through sweat glands, or through the sebaceous follicle. The surface of the stratum corneum presents more than 99% of the total skin surface available for percutaneous drug absorption1. Passage through this outermost layer is the rate \u0026ndash;limiting step for percutaneous absorption. The major steps involved in percutaneous absorption include the establishment of a concentration gradient ,which provides the driving force for drug movement a across the skin ,release of drug from the vehicle (penetration co-efficient);and drug diffusion across the layers of the skin(diffusion co-efficient).preferable characteristic of topical drugs include low molecular mass (600 Daltons),with adequate solubility in oil \u0026amp; water ,and have high partition co-efficient for the topical formulation.\u0026nbsp;\u003c/p\u003e\n\u003cp\u003eGels are a relatively newer class of dosage form created by entrapment of large amounts of aqueous or hydro alcoholic liquid in a network of colloidal solid particles.gel formulations generally provide faster drug release compared with ointments and creams. Major drawback of topical dosage form diffusion of drug in the delivery of hydrophobic drugs, and permeation through stratum corneum is for hydrophilic drugs. Therefore, to overcome this limitation emulgels are prepared.\u0026nbsp;\u003c/p\u003e\n\u003cp\u003eAim: The present research work was aimed to develop a novel emulgel for Diclofenac to enhance the drug absorption by the topical application, which overcomes the demerits of oral dosage form and conventional gel system of Diclofenac.\u003c/p\u003e\n\u003cp\u003eMethodology Preparation of Diclofenac emulgel The gel phase and emulsion phase were prepared separately. First, the gel phase was prepared by dispersing the different concentrations of carbopol 934 in distilled water and mixed by a mechanical stirrer. The emulsion phases were prepared by the addition of varying amounts of span 20 in varying quantities of liquid paraffin followed by mechanical stirring. The aqueous phase of emulgel was prepared by incorporating tween 20 in distilled water with continuous stirring, then methyl and propylparaben were added in propylene glycol, and Diclofenac (0.5 g) was dissolved in ethanol, and both the solutions were mixed with water phase of the emulsion. Both the water and oil phases were heated at 70\u0026ndash;80\u0026deg;C for 20 min. Later, the oily phase was added to the aqueous phase by gentle stirring and allowed to cool. Finally, the prepared emulsion was mixed with gel base in a 1:1 ratio by manual stirring to get a clear emulgel of Diclofenac. The pH of all the prepared emulgels was adjusted by dropwise addition of Triethanolamine.[8-10] A quantity of 100 g of Diclofenac was prepared for all the six formulations and the formulation composition of Diclofenac emulgels is shown in Table .\u003c/p\u003e\n\u003cp\u003eEvaluation of emulgels Drug-polymer compatibility by Fourier transforms infrared (FTIR) study This study was carried out by FTIR spectroscopy to verify whether the drug and polymer are compatible with one another or not. It was evaluated by obtaining the IR spectral data of Diclofenac and physical mixture of Diclofenac with carbopol 934 using ATR-Bruker FTIR spectrophotometer. The interaction study was concluded from the interpretation of IR spectra.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eAppearance :\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eAll the formulated Diclofenac emulgels were visually inspected for color, clarity, and homogeneity.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003ePh\u003c/strong\u003e:\u003c/p\u003e\n\u003cp\u003eThe pH of all the formulated emulgels was measured by digital pH meter.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eRheological study\u003c/strong\u003e :\u003c/p\u003e\n\u003cp\u003eThe viscosity of the emulgels was measured by Brookfield viscometer with \u0026ldquo;T\u0026rdquo; bar spindle at 5 rpm at a temperature of 25\u0026plusmn;2\u0026deg;C and the viscosity was recorded in cps.[14]\u0026nbsp;\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpreadability\u003c/strong\u003e:\u003c/p\u003e\n\u003cp\u003eAn ideal topical gel should possess a sufficient spreading coefficient when applied or rubbed on the skin surface. This was evaluated by placing about 1 g of formulation on a glass slide. Another glass slide of the same length was placed above that, and a mass of 500 g was put on the glass slide so that the gel gets sandwiched between the two glass slides and spreads at a certain distance.[15] The time taken for the gel to travel the distance from the place of its position was noted down. Spreadability was determined by the following formula.\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003c/p\u003e\n\u003cp\u003eWhere, S-Spreadability, g.cm/s\u003c/p\u003e\n\u003cp\u003eM-Weight put on the upper glass\u003c/p\u003e\n\u003cp\u003eL-Length of glass slide\u003c/p\u003e\n\u003cp\u003eT-Time for spreading gel in sec\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eSwelling index\u003c/strong\u003e :\u003c/p\u003e\n\u003cp\u003eIt was measured by placing 1 g of formulation in a porous aluminum foil and was placed in a 50 ml beaker containing 10 ml of 0.1 N sodium hydroxide. The samples were removed from beakers at different time intervals and put on the dry place for some time and reweighed.The swelling index of emulgels was calculated using the following formula.\u003cstrong\u003e\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eTable 1:\u0026nbsp;\u003c/strong\u003eFormulation design of Diclofenac emulgels\u003c/p\u003e\n\u003cdiv align=\"Left\"\u003e\n \u003ctable border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"576\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.96527777777778%\" rowspan=\"2\"\u003e\n \u003cp\u003e\u003cstrong\u003eIngredients\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"80.03472222222223%\" colspan=\"6\"\u003e\n \u003cp\u003e\u003cstrong\u003eFormulation code\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"15.8008658008658%\"\u003e\n \u003cp\u003e\u003cstrong\u003eAG-1\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"16.450216450216452%\"\u003e\n \u003cp\u003e\u003cstrong\u003eAG-2\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"16.450216450216452%\"\u003e\n \u003cp\u003e\u003cstrong\u003eAG-3\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"16.450216450216452%\"\u003e\n \u003cp\u003e\u003cstrong\u003eAG-4\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"18.3982683982684%\"\u003e\n \u003cp\u003e\u003cstrong\u003eAG-5\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"16.450216450216452%\"\u003e\n \u003cp\u003e\u003cstrong\u003eAG-6\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eDiclofenac\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e0.5 g\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.5 g\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.5 g\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.5 g\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e0.5 g\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.5 g\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eCarbopol 934\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e0.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e1%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e1.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e2%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e2.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e3%\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eLiquid Paraffin\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e8 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e8 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e10 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e10 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eSpan 20\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eTween 20\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.50%\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eMethylparaben\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003ePropylparaben\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e0.20%\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eEthanol\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003e5 ml\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eDistilled water\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003eq.s\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003eq.s\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.930675909878683%\"\u003e\n \u003cp\u003e\u003cstrong\u003eTriethanolamine\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.651646447140381%\"\u003e\n \u003cp\u003eq.s to adjust pH\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s to adjust pH\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s to adjust pH\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s to adjust pH\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"14.731369150779896%\"\u003e\n \u003cp\u003eq.s to adjust pH\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"13.17157712305026%\"\u003e\n \u003cp\u003eq.s to adjust pH\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003c/tbody\u003e\n \u003c/table\u003e\n\u003c/div\u003e\n\u003cp\u003e\u0026nbsp;Swelling index (SW) % = [(Wt-Wo)]/Wo \u0026times; 100\u003c/p\u003e\n\u003cp\u003eWhere, (SW) % = Equilibrium percent swelling\u003c/p\u003e\n\u003cp\u003eWt\u0026nbsp;= Weight of swollen emulgel after time t,\u003c/p\u003e\n\u003cp\u003eWo = Weight of emulgel before swelling at zero time, t.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eIn vitro Drug release study\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eRelease study of the emulgels was performed using modified Franz diffusion six cell apparatus which has donor and receptor compartment with a linear end for the solution withdrawal. A dialysis membrane, which was soaked overnight in phosphate buffer pH 7.4, was tied on the upper surface of the donor compartment. An amount of 12 ml of freshly prepared phosphate buffer pH 7.4 was put in receptor chamber. The dialysis membrane was sandwiched between the donor and receptor compartment. A magnetic bead was placed inside the receptor compartment by operating at 50 rpm and the apparatus assembly was maintained at 37\u0026plusmn;0.5\u0026deg;C. 500 mg of emulgel was placed on the dialysis membrane, which was mounted on the donor compartment. Aliquots of 1 ml were withdrawn at time intervals of every 30 min and diluted to 10 ml with phosphate buffer pH 7.4. The study was done for a time period of 6 h. All the solutions were scanned at 275 nm using UV Spectrophotometer. The amount of drug released was estimated, and the percentage cumulative drug release of the emulgels was calculated.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eParticle size analysis\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThis study was done for optimized formulation of Diclofenac emulgel. The procedure involves dilution of 1 g of emulgel with distilled water which was observed under high resolution Biovis Particle Size Analyzer and the average size of the particles were measured in microns.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eIn vitro skin irritation study\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eFor checking the skin irritation, an in vitro OECD recommended test was used known as Hen\u0026rsquo;s Embryo Test-Chorioallantoic Membrane (HET-CAM test). In this method, hen eggs which are freshly layed were used and were embroyonated to check the irritation on the developed chick embryo. Three groups were made, each containing three eggs.\u003c/p\u003e\n\u003cp\u003eNegative control: Here, the eggs were treated with 0.9% NaCl as a standard.\u003c/p\u003e\n\u003cp\u003eTest group: In this group, eggs were tested with the optimized formulation.\u003c/p\u003e\n\u003cp\u003ePositive control: In this, eggs were treated with 1% SDS (Sodium dodecyl sulfate) as an irritant for comparison with negative control and test.\u003c/p\u003e"},{"header":"Methods","content":"\u003cp\u003eThe collected hen\u0026rsquo;s eggs were placed on a metal tray which was kept in an incubator at temperature of 37\u0026plusmn;0.5 \u0026deg;C and relative humidity of 58\u0026plusmn;2\u0026deg;C required for the embryo development in the eggs. During incubation, the eggs were hand rotated 5 times in a day and this process was continued for 8 days. On 8th day, the incubated eggs were observed for the embryo growth and after confirmation the eggs were placed back to the incubator. On 9th day, the eggs were removed from the incubator and on the top surface; hole was drilled on the air sac of egg shell without harming the embryo. After making the hole, all the groped eggs were treated with respective solutions and observed for the signs of hemorrhage, coagulation, and lysis of blood vessels for a time period of 300 s (5 min).\u003c/p\u003e\n\u003cp\u003eThe irritation effect was confirmed by getting the mean irritation score from the formula.\u003c/p\u003e\n\u003cp\u003eThe irritation score (IS) formula is given below, followed by irritation score value with inference in table.\u003c/p\u003e\n\u003cp\u003e(301-H) (301- L) (301-C) IS = \u0026times;5 + \u0026times;7 + \u0026times;9 300 300 300\u003c/p\u003e\n\u003cp\u003eWhere, H-Hemorrhage.\u003c/p\u003e\n\u003cp\u003eL-Lysis of blood vessels.\u003c/p\u003e\n\u003cp\u003eC-Coagulation.\u003c/p\u003e"},{"header":"Result and Discussion","content":"\u003cp\u003e\u003cstrong\u003e1. Physical Appearance:\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eAll the Diclofenac emulgels formulations were found to be homogenous and showed no clogging and lumps which indicate good texture of system. All formulation batches were found to be homogenous yellowish milky emulsions previously while emulgels were found to be whitish viscous creamy preparation.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. pH\u003c/strong\u003e:\u0026nbsp;\u003c/p\u003e\n\u003cp\u003eThe pH of all the formulations was ranging in between 6.1-6.5 which is comparable to the human skin pH which is around .\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eTable 2: pH of the formulations\u003c/strong\u003e\u003c/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e\u003cstrong\u003eFormulations\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"52.19512195121951%\" colspan=\"4\" valign=\"top\"\u003e\n \u003cp\u003e\u003cstrong\u003epH\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e\u003cstrong\u003eMean(n=3)\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e6.0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e6.4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e5.9\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e5.9\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e6.2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e6.1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e6.4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e6.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e6.0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"12.195121951219512%\" valign=\"top\"\u003e\n \u003cp\u003e6.4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"27.804878048780488%\" valign=\"top\"\u003e\n \u003cp\u003e6.2\u003c/p\u003e\n \u003cp\u003e\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e3. \u003cstrong\u003eSpreadability:\u003c/strong\u003e\u0026nbsp;\u003c/p\u003e\n\u003cp\u003eEmulgel is considered to be good if it takes minimum time to spread on the surface. Among the various gels studied F3 emulgel has better spreadability. The values of spreadability indicate that the gel is easily spreadable by small amount of shear.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eTable 3: Spreadability of the Formulations\u003c/strong\u003e\u003c/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd width=\"20.0652528548124%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eFormulations\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"40.1305057096248%\" colspan=\"3\" valign=\"top\"\u003e\n \u003cp\u003eTime (sec.)\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"39.80424143556281%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eMean(n=3)\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e14\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e11\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e10\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e11\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e11\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e11\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e14\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e17\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e14\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003eF8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"19.967266775777414%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20.130932896890343%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003e4. Extrudability Study:\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThe values of extrudability of different formulations were range in between 13-18 seconds it indicates that all the formulation were easily extruded out.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u0026nbsp;Table 4: Extrudability study of formulations\u003c/strong\u003e\u003c/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd width=\"20.03257328990228%\" valign=\"top\"\u003e\n \u003cp\u003eFormulations\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"40.06514657980456%\" colspan=\"3\" valign=\"top\"\u003e\n \u003cp\u003eTime (sec.)\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"39.90228013029316%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eMean(n=3)\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e14\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e17\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e14\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e19\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e17\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e19\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e17\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e20\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e19\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e17\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e21\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003eF8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e19\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u003cstrong\u003e5. Rheological Study:\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThe viscosity of the formulations were studied at the 100 rpm of spindle no. 4 at 37ᵒC.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eTable 5: Rheological study of formulations\u003c/strong\u003e\u003c/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\" width=\"631\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd width=\"19.492868462757528%\" valign=\"top\"\u003e\n \u003cp\u003eFormulations\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"40.41204437400951%\" colspan=\"3\" valign=\"top\"\u003e\n \u003cp\u003eViscosity (cPs)\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"40.09508716323296%\" colspan=\"3\" valign=\"top\"\u003e\n \u003cp\u003eMean(n=3)\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1252\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1089\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1467\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1269\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1029\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1287\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1445\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1253\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e955\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1189\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1076\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1073\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1023\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1187\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1654\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1288\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1286\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1837\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1342\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1488\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1314\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1764\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1456\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1511\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1048\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1421\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e983\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1150\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003eF8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1363\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" colspan=\"2\" valign=\"top\"\u003e\n \u003cp\u003e1678\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1710\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"20%\" valign=\"top\"\u003e\n \u003cp\u003e1583\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u0026nbsp;\u003cstrong\u003e6. Drug diffusion study:\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eDifferent formulations were taken at the various time intervals and were measured by using UV Shimadzu 1800 at 275nm. wavelength.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eTable 6: % Drug diffusion of formulations\u003c/strong\u003e\u003c/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eFormulations\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e% Drug diffusion\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e94.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e87.6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e96.9\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e93.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e97.4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e98.5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e95.1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003eF8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"50%\" valign=\"top\"\u003e\n \u003cp\u003e91.3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003c/tbody\u003e\n\u003c/table\u003e\n\u003cp\u003e\u0026nbsp;\u003cstrong\u003e7. In-vitro drug release kinetics:\u0026nbsp;\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eDrug release of the different formulations were checked at the interval of 1 hour upto 12 hours it was found better in the F3 and F6 formulations.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eTable 7: Drug release kinetics of different formulations\u003c/strong\u003e\u003c/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003eTime (hrs.)\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003eF1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003eF2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003eF3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003eF4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003eF5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003eF6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003eF7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003eF8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e0\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e1\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e5.17\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e4.10\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e5.56\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e5.76\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e3.94\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e8.80\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e4.10\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e5.18\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e2\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e12.02\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e7.25\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e13.61\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e7.51\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e6.15\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e16.51\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e7.25\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e7.93\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e3\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e16.54\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e10.93\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e21.25\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e11.05\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e9.37\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e29.72\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e10.93\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e12.45\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e4\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e25.16\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e12.28\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e32.13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e16.54\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e11.20\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e38.64\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e12.28\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e17.62\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e5\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e33.47\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e23.68\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e39.58\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e25.93\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e22.46\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e47.38\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e23.68\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e26.01\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e6\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e41.31\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e28.41\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e46.40\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e30.24\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e25.34\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e55.13\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e28.41\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e32.85\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e7\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e49.67\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e33.06\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e51.79\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e38.85\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e29.81\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e63.02\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e33.06\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e42.65\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e8\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e58.46\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e37.12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e62.83\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e40.69\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e34.65\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e70.61\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e37.12\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e46.42\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n \u003ctd width=\"12.238325281803542%\" valign=\"top\"\u003e\n \u003cp\u003e9\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"9.98389694041868%\" valign=\"top\"\u003e\n \u003cp\u003e60.02\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e42.62\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e68.32\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e45.65\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd width=\"11.11111111111111%\" valign=\"top\"\u003e\n \u003cp\u003e40.65\u0026nbsp;\u003c/p\u003e\n \u003c/td\u003e\n \u003ctd 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\u003c/tbody\u003e\n\u003c/table\u003e"},{"header":"Discussion","content":"\u003cp\u003eThe future of pharmaceutical products will be rush up with topical delivery products because of drawbacks in oral, parenteral and other routes and more patient compliance.Loading of hydrophobic drug in hydrophilic gel matrix was found a solution by emulgel. Emulgel possess excellent bioadhesion, viscosity and long term stability which will increase compliance. In this study emulgels were prepared by using two different gel forming polymers in which the gel formulation with Carbomer 934 showed better clarity and stability for longer period of time.\u003c/p\u003e"},{"header":"Conclusion","content":"\u003cp\u003eIn this study emulgels were prepared by using two different gel forming polymers in which the gel formulation with Carbomer 934 showed better clarity and stability for longer period of time. In the study it was observed that the concentration of tween80 and linseed oil have shown effect on viscosity, spreadability and in-vitro drug permeability.In terms of pH the observed value of all the formulations were comparable to human skin pH. All the formulation were found to be easily spreadable. In drug permeation study and drug release data showed that F6 formulation showed better drug release data compared to other formulations. So it is considered as the optimized batch. Hence, Diclofenac emulgel was successfully prepared and evaluated.\u003c/p\u003e"},{"header":"Declarations","content":"\u003cp\u003eThe IAEC of Truba Institute of Pharmacy has approved this study\u003c/p\u003e"},{"header":"References","content":"\u003col\u003e\n \u003cli\u003eRachit Khullar, emulgels: a surrogate approach for topically used hydrophobic drugs- International journal of pharmacy and biological sciences- 2011, 117-128\u003c/li\u003e\n \u003cli\u003eKaisar Raza, topical delivery of Diclofenac: challenges and promises of novel drug delivery system- Biomed research journal \u0026ndash; 2014, 406731\u003c/li\u003e\n \u003cli\u003eAshara Kalpesh C - Emulgel: a no refusable formulation to improve solubility, penetration and percentage of Diclofenac release for suppressing PGE2 synthesis- British Biomedical Bulletin-2014, 2347-5447\u003cstrong\u003e.\u0026nbsp;\u003c/strong\u003e\u003c/li\u003e\n \u003cli\u003eDebjit Bhowmik - The pharma innovation recent advances in novel topical drug delivery system- The pharma journal- 2012, 2277-7965.\u003c/li\u003e\n \u003cli\u003eAshni Verma - Topical gels as drug delivery system: A review-International journal of pharma sceinces and research- 2013, (374-382)\u003c/li\u003e\n \u003cli\u003eRachit Khullar - Emulgels: A surrogate approach for topically used hydrophobic drugs- International journal of pharmacy and biosciences\u003cstrong\u003e-\u0026nbsp;\u003c/strong\u003e2012, (117-12)\u003c/li\u003e\n \u003cli\u003eK.P.Mohammed Haneefa - Emulgel: An advanced review- Journal of pharmaceutical sciences and research \u0026ndash; 2013, (254-258)\u003c/li\u003e\n \u003cli\u003eA.S.Panwar - Emulgel: A Review, Asian journal of pharmacy and life sciences, , (2011).\u003c/li\u003e\n \u003cli\u003eDiclofenac- https://www.drugbank.ca/ drugs/DB06736\u003c/li\u003e\n \u003cli\u003eNoh K, absolute bioavailability and metabolism of Diclofenac in rats- Arch pharm- 2015, 68-72.\u003c/li\u003e\n \u003cli\u003eBurkhard Hinz, Diclofenac spares cox-1 as a result of limited but sustained biotransformation to diclofenac- clinical pharmacology\u0026amp; therapeutics- 2003, 222-235.\u003c/li\u003e\n \u003cli\u003eDr. Mansij Biswas, Topical route of administartion and dosage forms, slide share.\u003c/li\u003e\n \u003cli\u003eN.S.Chandrasekhar, Physicochemical and pharamcokinetic parameter in drug selection and loading for transdermal drug delivery- Indian journal of pharmaceutical science-2008, 94-96.\u003c/li\u003e\n \u003cli\u003eShakeel F Ramadan, Solubilityand dissolution improvement of Diclofenac using different nanocarriers- J bioeuivalance availab -2009, 039-043.\u003c/li\u003e\n \u003cli\u003eDrug Index- www.drugsupdate.com/ genric/view/5/Diclofenac\u003c/li\u003e\n \u003cli\u003eDrug Update- www.drugsupdate.com/ brand/showavailablebrands/5/17\u003c/li\u003e\n \u003cli\u003eDiclofenac \u0026ndash; 2018 https://en.m.wiki-pedia.org/wiki/acecloofenac\u003c/li\u003e\n \u003cli\u003eCAS registry number https://en.m.wikipedia.org/wiki/CAS_Registry_Number\u003c/li\u003e\n \u003cli\u003eArun Gokul T.S, Formulation and Optimization of Diclofenac gel- Research in Pharmacy- 2013, 14-22.\u003c/li\u003e\n \u003cli\u003ePottalaswathi, Formulation and evaluation of Diclofenac topical emulgel- IJAPSIRD, 2015(0052-0057).\u003c/li\u003e\n \u003cli\u003eSnehal P. Mulye, Formulation development and evaluation of Indomethacin emulgel- Pelagia Research Library, 2013,4(5):31-45\u003c/li\u003e\n \u003cli\u003eRajesh Katara, Diclofenac oil Drops: Characterization and evaluation against ocular inflammation- Pharmaceutical Development and Technology,2017- 1097-9867.\u003c/li\u003e\n \u003cli\u003eAijaz A. Sheikh, Formulation development and characterization of Diclofenac gel conatining linseed oil and ginger oleoresin-IJPTR, 2011-(1448-1453).\u003c/li\u003e\n \u003cli\u003eP C Sathya Keerthi Pani, Emulgel: A novel for enhancing topical delivery of Diclofenac- Inventi Rapid: NDDS Vol. 2015-(0976-3791).\u003c/li\u003e\n\u003c/ol\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":true,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":false,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Diclofenac , TLC, Triethanolamine","lastPublishedDoi":"10.21203/rs.3.rs-4366526/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4366526/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eBenzimidazoles are an important class of compounds with a wide spectrum of biological activity ranging from anti-hypertensive, antiviral, anti-fungal, antitumor and anthelmintic activity. Benzimidazole rings are the most important nitrogen-containing heterocycles, which are widely explored and utilized by the pharmaceutical industry for drug discovery. Due to their special structural features and electron-rich environment, Benzimidazole containing drugs bind to a variety of therapeutic targets, thereby exhibiting a broad spectrum of bioactivities. Numerous benzimidazole based drugs have been extensively used in the clinic to treat various types of diseases with high therapeutic potential. A series of benzimidazole derivatives were synthesized by a single step process by reacting o-phenylenediamine and benzoic acid. The purity and structure confirmation of the synthesized compounds were done by TLC and \u003csup\u003e1\u003c/sup\u003eHNMR. The compounds were evaluated for anti-microbial, anti-fungal and antioxidant activity.\u003c/p\u003e","manuscriptTitle":"Formulation And Development Of Diclofenac Topical Emulgels","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-05-10 06:12:52","doi":"10.21203/rs.3.rs-4366526/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"0930fbdb-2aee-411d-aa28-307ed7e34ae9","owner":[],"postedDate":"May 10th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-05-10T06:12:52+00:00","versionOfRecord":[],"versionCreatedAt":"2024-05-10 06:12:52","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4366526","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4366526","identity":"rs-4366526","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}