Exemestane vs Masteron
FDA Approved vs Moderate Research
synergistic Mechanism-based · 60% Masteron helps manage estrogen conversion from Exemestane. This is a common and recommended combination. Adjust AI dose based on bloodwork — avoid crashing estrogen.
Molecular Data
Exemestane Masteron
Weight 296.40 Da 304.47 Da (base)
Half-life ~24 hours ~2 days (propionate), ~10 days (enanthate)
Type Steroidal aromatase inhibitor (irreversible, suicide inhibitor) DHT-derived anabolic steroid (C20H32O2)
Key Benefits
Exemestane
01 Irreversible aromatase inactivation eliminates estrogen rebound upon discontinuation
02 Steroidal structure with mild androgenic activity may offset some low-estrogen side effects
03 Potent estrogen suppression (85-95% reduction in estradiol at full dose)
04 Compatible with tamoxifen (unlike anastrozole, no pharmacokinetic interference)
05 Prevents gynecomastia during testosterone or aromatizable steroid cycles
06 Reduces estrogen-driven water retention, bloating, and blood pressure elevation
07 Oral dosing with once-daily or less frequent administration for cycle support
Masteron
01 Produces a hard, dry, and grainy appearance by eliminating subcutaneous water retention
02 Mild anti-estrogenic properties that can reduce or replace the need for aromatase inhibitors on cycle
03 Does not aromatize, eliminating estrogen-mediated side effects from the compound itself
04 Enhances the visual effects of other steroids in a stack by reducing water retention and bloat
05 Modest increases in strength without significant weight gain, useful for weight-class athletes
06 Improves muscle density and vascularity at low body fat percentages
07 Well-tolerated with a relatively mild side effect profile compared to other anabolic steroids
08 Short detection window with propionate ester compared to many other injectable steroids
Dosing Protocols
Exemestane
12.5mg EOD or 25mg E3D (estrogen management) / Every other day to every 3 days (cycle support); daily (breast cancer)
Masteron
300-500 mg/week / Every other day (propionate) or 2x per week (enanthate)
Cutting / Aesthetic Enhancement 300-400 mg/week Every other day (propionate) or 2x per week (enanthate)
Contest Preparation 400-500 mg/week Every other day or daily (propionate)
AI Replacement / Estrogen Management 200-300 mg/week Every other day (propionate) or 2x per week (enanthate)
Side Effects
Exemestane
Joint pain and stiffness (generally less severe than with anastrozole due to mild androgenic activity)
Fatigue and general malaise
Hot flashes or flushing
Mood changes (irritability, flat affect, low mood)
Headache
Increased sweating
Masteron
Hair loss and accelerated male pattern baldness (significant risk as a DHT derivative - the most commonly reported side effect)
Acne and increased skin oiliness, particularly on the back and shoulders
Suppression of natural testosterone production (requires PCT or ongoing TRT)
Injection site pain or discomfort (more common with propionate ester)
Mild aggression or irritability from elevated androgenic activity
HDL cholesterol suppression and adverse lipid profile changes
Contraindications
Known hypersensitivity to exemestane or any excipients
Premenopausal women (not indicated and potentially harmful to reproductive function)
Pregnancy or breastfeeding (teratogenic risk)
Severe hepatic impairment
Pre-existing severe osteoporosis or high fracture risk
Concurrent use with other aromatase inhibitors (anastrozole, letrozole)
Prostate cancer (active or history of hormone-sensitive prostate cancer)
Breast cancer in males
Pregnancy or potential for pregnancy (causes virilization of female fetus)
Known hypersensitivity to drostanolone or any formulation components
Severe hepatic impairment
Pre-existing significant hair loss where further androgenic exposure is unacceptable
Polycythemia (hematocrit above 54% at baseline)
Uncontrolled cardiovascular disease or severe dyslipidemia
Research Evidence
Exemestane Masteron
Status FDA Approved Moderate Research
References 5 studies 5 studies
Latest — March 2020
FDA Approved Yes No
This comparison is for educational and research purposes only. Consult a healthcare professional before use.