MASTERONE PROPIONATE

Product Name & Packaging

Brand Name: MASTERONE PROPIONATE
Generic Name: Drostanolone propionate (also listed as dromostanolone propionate / Masteron in PubChem synonym data)
Strength & Packaging: 10 mL vial, 100 mg/mL (as provided). The exact concentration and pack size should be confirmed against the specific manufacturer’s approved carton and insert before publication.

Description

Drostanolone propionate is a steroid ester in the anabolic-androgenic steroid class. PubChem identifies it as a 3-oxo-5alpha-steroid and notes a role as an antineoplastic agent. A peer-reviewed NIH-hosted paper describes drostanolone propionate as an injectable anabolic-androgenic steroid derived from dihydrotestosterone (DHT).

Indications

Historically, PubChem lists drostanolone propionate for palliation of androgen-responsive recurrent mammary cancer in women who are more than one year but less than five years postmenopausal. More recent review literature also describes drostanolone as a steroid formerly used in breast cancer treatment and now largely discussed in the context of discontinued or nonroutine use rather than common modern prescribing.

Dosage & Administration

Because I did not verify a current official product monograph for this exact 10 mL / 100 mg/mL presentation, the safest professional wording is: use only according to the exact manufacturer’s approved labeling and under licensed clinical supervision. The NIH-hosted review describes drostanolone propionate as an injectable steroid, and esterification is used to extend duration after intramuscular or subcutaneous administration, but that should not be treated as a product-specific dosing instruction for this vial.

Mechanism of Action

Drostanolone propionate acts as an androgenic steroid and is described in the literature as an agonist of the androgen receptor. As an esterified form, the propionate moiety affects release characteristics after injection, while the active steroid exerts androgenic and anabolic effects in target tissues.

Precautions

This product should not be presented as a routine wellness or fitness product. DEA states that anabolic steroids are Schedule III controlled substances in the United States and that only a small number are approved for human or veterinary use. Broader NIH and DEA references warn that anabolic-steroid use or abuse is associated with risks including cholesterol abnormalities, cardiovascular disease, liver injury, infertility, mood and behavioral changes, and dependence.

Side Effects

Class-related adverse effects reported for anabolic steroids include acne, fluid retention, mood changes, aggression, menstrual irregularities, deepening of the voice, increased facial/body hair in women, male-pattern baldness, gynecomastia, reduced sperm count, sterility, and increased risk of heart attack or stroke. Injectable nonsterile products also add infection risk if manufactured or administered improperly.

Storage

I could not verify authoritative storage instructions for this exact 10 mL / 100 mg/mL drostanolone propionate vial from an official product insert. The safest catalog wording is: Store according to the manufacturer’s approved label, package insert, and local regulatory requirements. That is especially important because DEA notes many anabolic-steroid products in circulation are obtained through nonstandard or illicit channels rather than approved prescribing systems.