Masteril®

What Is Drostanolone Propionate 100mg?

Masteril by Sigma Pharmaceuticals contains drostanolone propionate 100mg per mL. Drostanolone is a derivative of dihydrotestosterone (DHT) with an added 2-alpha methyl group, which increases its stability in the body. The propionate ester provides a relatively fast release after intramuscular administration.

Medical Use and History

Drostanolone was introduced in the late 1950s and was prescribed for advanced, inoperable breast cancer in postmenopausal women. Its anti-estrogenic activity made it useful in hormone-sensitive oncology before newer treatments replaced it. It was marketed under brand names such as Masteron and Drolban and was later withdrawn from most markets as newer therapies became available.

Key Properties of Drostanolone Propionate 100mg

• DHT-derived structure that does not convert to estrogen (non-aromatizing)
• Short propionate ester for faster onset and clearance
• Moderate anabolic activity combined with androgenic properties

Formulation: pharmaceutical-grade MCT oil (USP) carrier with benzyl alcohol and benzyl benzoate, free of ethyl oleate.

Every vial of drostanolone propionate 100mg from Sigma carries a single-use security code that can be verified on this website.

Drostanolone Propionate is a Schedule III controlled substance in the United States. The information on this page is provided for reference only.