RU58841 is an Androgen Inhibitor medication. This medication is used topically, primarily for the treatment of androgenic alopecia (androgen-induced balding). RU58841 was developed as topical a treatment for hair-loss, hirsuitism and acne. Although this medication was never commercialized, it is occasionally used to treat hair loss and is widely available online. RU58841 is not generally used as a treatment for acne.