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.