Primobolan Depot 100 mg/mL is an injectable formulation containing the enanthate ester of methenolone. The esterified structure modifies the release characteristics of the active compound, contributing to gradual and sustained availability following administration.

Methenolone is a synthetic androgenic-anabolic compound that interacts with intracellular androgen receptors. This interaction influences androgen-responsive cellular processes associated with protein metabolism and nitrogen balance. The 100 mg/mL concentration provides a standardized formulation strength.