Metenolone acetate, or methenolone acetate, sold under the brand names Primobolan and Nibal, is an androgen and anabolic steroid (AAS) medication which is used mainly in the treatment of anemia due to bone marrow failure. It is taken by mouth. Although it was widely used in the past, the drug has mostly been discontinued and hence is now mostly no longer available. A related drug, metenolone enanthate, is given by injection into muscle.