Fluoxymesterone, sold under the brand names Halotestin and Ultandren among others, is an androgen and anabolic steroid (AAS) medicine which is utilized in the therapy of low testosterone levels in men, postponed pubescence in young men, bosom disease in ladies, and anemia. It is taken by mouth.

Results of fluoxymesterone incorporate side effects of masculinization like skin inflammation, expanded hair development, voice changes, and expanded sexual desire. It can likewise cause liver harm and cardiovascular secondary effects like high blood pressure. The medication is a manufactured androgen and anabolic steroid and thus is an agonist of the androgen receptor (AR), the organic objective of androgens like testosterone and dihydrotestosterone (DHT). It makes solid androgenic impacts and moderate anabolic impacts, which make it helpful for creating masculinization.

Fluoxymesterone was first portrayed in 1956 and was presented for clinical use in 1957. notwithstanding its clinical use, fluoxymesterone is utilized to further develop physical make-up and performance. The medication is a controlled substance in numerous nations thus non-clinical use is by and large illegal.