Proviron (Mesterolone):Proviron is the Schering brand name for the oral androgen mesterolone(1 methyl-dihydrotestosterone). Just as with DHT, the activity of mesterolone is that of a strong androgen which does not aromatize into estrogen. In clinical situations Proviron is generally used to treat various types of sexual dysfunction, which often result from a low endogenous testosterone level. Mesterolone can usually reverse problems of sexual disinterest and impotency, and it is sometimes used to increase the sperm count. Proviron does not stimulate the body to produce testosterone, but mesterolone is simply an oral androgen substitute that is used to compensate for a lack of the natural male androgen.