Oxymetholone (also known as anapolon or anadrol) is a very drastic synthetic steroid, 17-alpha-alkylated modification of dihydrotestosterone. It was developed for the treatment of osteoporosis and anaemia, as well as to stimulate muscle gain in malnourished and debilitated patients. Oxymetholone has been approved by the American Food and Drug Administration (FDA) for use in humans. Later there where created non-steroidal drugs that effectively could treat anaemia and osteoporosis; because of this anapolon lost his popularity and by 1993 Syntex decided to cease the production of the drug, as well as other manufacturers did.
Primobolan is available as 25mg oral tablets (acetate) and 100mg/ml injectable vials or ampoules (enanthate). An effective dose is 75mg every day (oral), 250mg per week (injectable) or up to per pound of body weight. The oral tablets are not 17 alpha alkylated (17aa) and therefore the liver destroys a large part of the product on its first pass. Primobolan is cycled with equipoise or testosterone enanthate at 250mg per week to increase muscle growth or parabolan at 228mg per week or winstrol at 50mg every other day to increase muscle hardness and definition.