<prompt> Danazol is used in the treatment of:Cyclical mastalgiaBreast cystNon-cyclical mastalgiaEpithelial changes in breast  <response>: Danazol is a synthetic testosterone which binds to progesterone and androgen receptors Danazol is used for benign breast diseases and is good for fibrocystic disease. Cyclical mastalgia due to increase engorgement estrogenic will also be relieved with danazol. Almost 70 patients with cyclical mastalgia will repo relief. 