Proviron is the Schering commercial name of the hormone Mesterolone, a derived dihydrotestosterone (DHT) with similitudes of other DHT based anabolic steroids. The direct action of Proviron is similar to Stanozolol. Although it is not the compound of choice for building muscles, the mesterolone is very usefull and effective when stacked with others anabolic steroids due to its unique capacity to prevent testosterone from converting into estrogen, which gives a better anabolic effect to the testosterone. This helps the bodybuilder in many ways. First, it helps to reduce the estrogenic side effects of the anabolic steroids, like the water retention, the loss of libido and gynecomastia. Also Proviron can help to increase the testosterone potency in the body by freeing the testosterone from the globulin.
Medical use of Proviron or Mesterolone
This anabolic steroid has a strong androgynous activity which does not aromatize into estrogen. Clinically, Proviron is generally used to treat some types of erectile dysfunction, which is often the result of low testosterone levels. Usually, it can revert the libido problems and impotence, and sometimes it used to increase sperm count. This drug does not stimulate testosterone production, it is just used to compensate the lack of the male hormone.
Use of Proviron in bodybuilding
In spite of this steroid is highly androgynous, its anabolic effect is considered as weak for building muscle. It is because Proviron is quickly reduced to inactive metabolites in the muscular tissue, a characteristic feature of the dihydrotestosterone. The anabolic weak nature of this compound indicate a tendency to block the androgen receptors in the muscular tissue, which reduce the gains from others more potent anabolic steroids, but this should not be taken seriously, because it just reduce water retention, so you have less bloat. In fact Proviron will help you to gain lean muscular mass, and helps you to lose the water gains after your cycle. In athletes, Proviron is mainly used as an anti-estrogen. It is believed that Proviron plays as an anti-aromatase in the body, preventing or delaying the steroids conversion into estrogen. The result could be compared to Arimidex (although deeper), the drug acts to prevent the estrogen accumulation in the body.
Typical dosage for men is 25-100mg per day, this dosage is enough to prevent gynecomastia. It’s important to remember that this drug is used throughout the total length of your cycle. Proviron is often stacked with Nolvadex (tamoxifen) or Clomid when high intake of estrogenic steroids (dianabol, anadrol, testosterone). Daily intake of 50mg Proviron and 20mg Nolvadex have shown to be very effective in this case, and it is extremely rare it needs higher dosages. Women should not exceed 25mg of Proviron per day and no more than 5 weeks due to its virilization effects.
Proviron has relatively no side effects if dosage is respected, but at very high dosage it could lead to acne, facial hair growth, hair loss, high blood pressure, increase of bad cholesterol. At very high dose 300mg per day, Proviron can shut down your natural testosterone production. Proviron could produce virilization symptoms in women like voice changes, clitoris enlargement, facial hair growth, and menstrual cycles stopped. But if you respect the correct dosage, you should not be worried about these side effects which almost always occur in very high dosage. Proviron is used to avoid side effects and not to get more side effects. So I would recommend you to stick to the correct dosage and all will be fine!