Proviron is actually a drug with anti-estrogenic activity. By blocking the estrogen receptors in the brain, it causes a surge in the release of the Gonadotropins (LH and FHS) which then induce the testes to make more testosterone.
The drug does not possess any direct anabolic or androgenic activity.
It was first synthesized in the 70s and by the late 90s had disappeared from the market. Schering the pharmaceutical company no longer makes the product. Every seller on the internet who claims they have the product is either not honest or is probably selling a fake product. There is no mass manufacture of this drug. While Proviron is available on cyberspace for sell, there are reports that the drug is smuggled in from in from Asia, Russia and Mexico. In all these cases, the authenticity of Proviron is in doubt.
It way initially tried out to treat both men and women who had depression and anxiety. What was discovered in these studies was that the drug led to an increase in the Gonadotropins (LH & FSH) and increased testosterone levels. This then led to its use in the treatment of fertility problems. Today Proviron is no longer available and not used to treat any medical disorder. Almost without question, whatever is available on the internet is not Proviron and most likely fake or counterfeit.