Development and in vivo evaluation of buccal tablets prepared using danazol–sulfobutylether 7 β‐cyclodextrin (SBE 7) complexes
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This study developed and evaluated buccal tablets containing danazol complexed with SBE $\beta$-cyclodextrin, demonstrating improved drug release.
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Abstract
The aim of the present work was to develop a mucoadhesive controlled-release formulation of danazol-sulfobutylether 7 beta-cyclodextrin (SBE 7) complex and to evaluate the feasibility of improving the bioavailability of danazol via the buccal route. Different types of polymers, polycarbophil (PC) and hydroxypropylmethyl cellulose (HPMC) were mixed with danazol-SBE 7 complex and compressed into tablets. These tablets were evaluated for their dissolution and mucoadhesion properties and for drug absorption in female beagle dogs. Increased mucoadhesion was observed for PC-containing tablets compared with HPMC tablets. As the concentration of polymer increased, drug release decreased, and PC-containing tablets gave slower release compared to HPMC tablets. In vivo bioavailability performed in dogs showed that the perorally administered danazol-SBE 7 complex and the danazol-SBE 7 (in PC matrix) buccal tablets had absolute bioavailabilities of 64% and 25%, respectively, that are significantly greater than 1.8% observed for the commercial formulation Danocrine. The increased bioavailability was attributed to the enhanced solubility consequent to complexation, and the possible avoidance of first-pass metabolism upon buccal administration.
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