It is used to treat muscle wasting diseases because of its protein synthesis and retention of nitrogen. Parabolan has a half-life of 8-10 days, the longest out of the trenbolone derivatives. Dosage is dependent on your previous experience with anabolic steroids and desired results.Trenbolone Acetate powder is usually used at doses of 35-150 mg/day, and more typically 50-100 mg/day. Most users find 50-75 mg/day to be an ideal dosage range, giving excellent benefit as part of an anabolic steroid stack.Metenolone enanthate, or methenolone enanthate, sold under the brand names Primobolan Depot and Nibal Injection, is an androgen and anabolic steroid (AAS) medication which is used mainly in the treatment of anemia due to bone marrow failure. It is given by injection into muscle.One of the two anabolic steroids for which Alex Rodriguez tested positive, according to published reports, was Primobolan, a drug that is illegal to sell or market in the United States. The United States Food and Drug Administration has banned the drug from entry into the United States. In July 1989, the F.D.A.