Primobolan is the brand name for the anabolic steroid methenolone acetate. Methenolone enanthate is a non C17 alpha alkylated steroid, which makes it one of the few commercially available agents that presents limited liver toxicity to the user. Methenolone was first developed in the 1960s. The pharmaceutical company Squibb first introduced the drug to the United States market in 1962. The agent was sold for a short time as a 20mg tablet under the brand name of Nibal. The large pharmaceutical company Schering out of West Germany was granted rights to the drug then marketed under the name of primobolan brand name. Shortly after this, nibal was removed from the U.S. market and never returned to the commercial market. Primobolan is prescribed as a lean tissue building anabolic agent, often used in cases where body wasting has occurred secondary to major surgery, infection, wasting disease, and malnutrition. Although primobolan has demonstrated a good record of medical safety, Schering has since withdrawn this drug from most of the markets.
Among athletes primobolan is generally known as a mild steroid which provides slow steady gains in quality muscle mass while not being harsh on one’s system. It is often used in cutting cycles when the athlete is in a calorie restricted diet and trying to preserve muscle mass while shedding bodyfat. Primobolan is notorious for being very effective in this particular case. It is also popular for athletes looking to add a little muscle and strength in speed related or weight restricted sports. Primobolan is not aromatized by the body and therefore doesn’t convert to estrogen. Therefore, estrogen related side effects shouldn’t be a concern when taking this agent and users need not worry about taking any anti-estrogens when running it by itself. Androgenic side effects are possible with primobolan, especially when it is taken at higher doses. These side effects can include things such as oily skin, acne, and increased body and facial hair growth. In women androgen can cause masculizing side effects such as deepening of the voice and the growth of facial hair. Like all anabolic steroids, primobolan will hinder the body’s natural ability to produce testosterone, hence meaning that the user should run a post cycle therapy protocol and the conclusion of the cycle. Many users also choose to add testosterone into the cycle. Because primobolan isn’t toxic or harsh on the system, users often choose to run it for longer periods of times than they would harsher compounds or C17aa orals which could cause damage to the liver. It’s not uncommon to see cycles including this compound to be ran for a period of 12-16 weeks and sometimes even longer.
300-800 mg per week. Women also find this steroid favorable due to its mild nature and generally respond well to dosages of 100-200 mg a week.