Primobolan is an oral anabolic steroid that is a little unique compared to many oral anabolic steroids. Before we go any further, it’s important we distinguish the difference between Primobolan and Primobolan Depot. Primobolan Depot is an injectable version of the hormone that is attached to the large/long Enanthate ester. Primobolan is comprised of the same active steroidal hormone in Methenolone; however, it is attached to the small/short Acetate ester and designed for oral administration.
The Methenolone hormone was first released in 1962 by Squibb in both the oral Acetate and injectable Enanthate form. The hormonal compounds both carried the Nibal name, Nibal and Nibal Depot, but were very short lived products. In the mid-1960’s the giant German pharmaceutical company Schering would obtain the rights to the Methenolone hormone introducing it under the Primobolan name. Since that time, Primobolan has been well-known for being a European anabolic steroid. It has never been manufactured in the U.S. since the Squibb versions.