Proviron or Mesterolone is a derivative of dihydrotestosterone (DHT) and generally used to treat sexual dysfunction that is a common complication with users of anabolic steroids and performance enhancing drugs due to low endogenous testosterone level when harsh or aromatizable drugs are used. This drug is also effective for improving the sperm count, which means that is a drug for sexual performance and satisfaction. Though it does not stimulate the body to produce more of testosterone, this oral androgen substitute does compensate for absence or lack of androgen.

Its chemical name is 1 alpha-methyl-17 beta-hydroxy-5 alpha-androstan-3-one and its androgenic/anabolic ratio is 30-40/100-150. Its molecular weight is 304.4716 g/mol at the base. It has an active life of approximately 8-24 hours and is classified as A. 21.7 Male sex hormones.

Proviron is an exceptional drug, to say the least, when it comes to creating a balancing of androgen formation deficiency that happens with growing age. This drug is well tolerated by the liver being not a c17 alpha alkylate compound and does not impair spermatogenesis. Proviron is admired by professional sportsmen as it helps them reduce estrogen and increase androgen level during contest preparations. Proviron is also considered effective for people suffering from complications such as sleep disturbances, irritability, reduced efficiency, depression, weak memory, and libido.

The recommended dose of Proviron is 25-100 mg per day. When used in a combination with anabolic steroids and performance enhancing drugs such as Testosterone and Dianabol, the use of antiestrogens such as Clomid or Nolvadex may be required. However, Proviron is not meant for individuals undergoing androgen therapy of any kind or suffering from prostate cancer.