Hormonal Therapy in Endometriosis and Adenomyosis: Danazol, Aromatase Inhibitors
Danazol and aromatase inhibitors treat endometriosis and adenomyosis by reducing estrogen, but both have significant side effects limiting their use.
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This paper is a narrative overview of hormonal therapies with hypoestrogenic mechanisms—specifically danazol and aromatase inhibitors—for endometriosis and adenomyosis, describing evidence from randomized trials for endometriosis-related pain and other study types across disease subtypes. It reports that danazol has shown efficacy for endometriosis pain but is limited by androgenic adverse effects, while aromatase inhibitors can treat forms of endometriosis including ovarian endometrioma and deep-infiltrating disease but are constrained by side effects such as myalgia, arthralgia, and loss of mineral bone density, and adenomyosis evidence is comparatively sparse (including limited/early studies such as danazol-loaded intrauterine devices and only one RCT of aromatase inhibitors). The paper’s caveat is that available adenomyosis data are limited, and its comparisons emphasize safety/tolerability constraints rather than robust head-to-head outcomes across all indications. Relevance to endometriosis: the chapter directly reviews randomized controlled trial evidence for danazol efficacy in endometriosis pain and multiple studies of aromatase inhibitors in endometriosis subtypes, while also noting limited data for adenomyosis; however, its main focus is hormonal therapy options (danazol and aromatase inhibitors) across both conditions.
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