Mesterolone, sold under the brand name Proviron among others, is an androgen and anabolic steroid (AAS) medication which is used mainly in the treatment of low testosterone levels.
Mesterolone, also known as 1α-methyl-4,5α-dihydrotestosterone (1α-methyl-DHT) or as 1α-methyl-5α-androstan-17β-ol-3-one, is a synthetic androstane steroid and derivative of DHT. It is specifically DHT with a methyl group at the C1α position. Closely related AAS include metenolone and its esters metenolone acetate and metenolone enanthate.The antiandrogen rosterolone (17α-propylmesterolone) is also closely related to mesterolone.
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