Masteron (Drostanolone Propionate) 100 mg/mL

·        Generic Name: Drostanolone Propionate

·        Brand Name: Masteron 100

·        Dosage Form: Injectable oil-based solution

·        Concentration: 100 mg/mL

·        Packaging: 10 mL vial

·        Active Ingredient: Drostanolone Propionate (100 mg per 1 mL)

·        Vehicle: Typically dissolved in carrier oil (e.g., sesame or cottonseed oil) with benzyl alcohol as a preservative.

2. Pharmacological Class:

·        Category: Anabolic-androgenic steroid (AAS)

·        Ester: Propionate (short-acting, fast release)

·        Anabolic Rating: Moderate (primarily used for hardening muscles)

·        Androgenic Rating: Moderate (lower than testosterone)

·        Aromatization: None (does not convert to estrogen).

3. Uses:

·        Medical Use:

o   Historically used for breast cancer treatment (rare today).

·        Bodybuilding/Performance Enhancement:

o   Cutting Cycles: Enhances muscle hardness, vascularity, and fat loss.

o   Contest Prep: Reduces water retention for a "dry" look.

o   Stacking: Often paired with Trenbolone or Testosterone.

4. Administration & Dosage:

·        Route: Intramuscular (IM) injection

·        Half-Life: ~2–3 days (propionate ester requires frequent injections).

·        Typical Dosage (Men):

o   Beginner: 100–200 mg every other day (300–600 mg/week).

o   Advanced: 300–500 mg/week (split into EOD injections).

·        Women: Rarely used (moderate virilization risk).

·        Detection Time: Up to 2–3 months in drug tests.

5. Side Effects (Generally Mild but Possible):

·        Androgenic:

o   Acne, oily skin, hair loss (if genetically prone).

o   Virilization in women (voice deepening, clitoral enlargement).

·        Estrogenic:

o   None (no gynecomastia or water retention).

·        Cardiovascular:

o   May lower HDL ("good" cholesterol).

·        HPTA Suppression:

o   Mild to moderate (PCT still recommended).

6. Contraindications & Warnings:

·        Avoid Use In:

o   Pregnancy (risk of fetal masculinization).

o   Pre-existing prostate/liver conditions.

o   Severe cardiovascular disease.

·        Drug Interactions:

o   May enhance anticoagulant effects (e.g., warfarin).

7. Storage & Handling:

·        Storage:

o   Room temperature (20–25°C / 68–77°F); protect from light.

·        Shelf Life: ~2–3 years unopened.