Fluoxymesterone (Fluoxymesterone (Halotestin))
A very potent oral androgen (Halotestin) prescribed historically for hypogonadism and breast cancer, known non-medically for dramatic strength and aggression increases without added mass. Educational reference only.
How it works
A 17-alpha-alkylated, fluorinated derivative of methyltestosterone with extremely high androgenic potency. It boosts strength, aggression, and red blood cells rapidly but does little for muscle size.
Key facts
- Molecular weight: 336.4 Da
- Half-life: ~9 hours
- Bioavailability: Oral
- Storage: Room temperature; keep dry.
Dosing overview
- Typical dose: Medical: ~2.5-20 mg/day
- Frequency: Daily
- Duration: Very short courses
- Route: Oral tablet
Protocol notes
- Medically dosed for hypogonadism or breast cancer under supervision.
- Non-medically used briefly for strength/aggression peaks (e.g. before competition).
- Extremely hepatotoxic; only very short courses.
Reported benefits
- Rapid strength gains
- Increased aggression/drive
- Red blood cell stimulation
- No added water weight
Possible side effects
- Severe liver toxicity
- Aggression/mood changes
- Adverse lipids
- Testosterone suppression
- Androgenic effects
Research
- Fluoxymesterone potency (2014): Exhibited high androgenic potency and strength effects, with significant hepatotoxicity limiting use.
Compare Fluoxymesterone
Research and educational reference only. Not medical advice.