Fluoxymesterone vs Nandrolone Phenylpropionate
A side-by-side research comparison of Fluoxymesterone and Nandrolone Phenylpropionate across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | Fluoxymesterone | Nandrolone Phenylpropionate |
|---|---|---|
| Full name | Fluoxymesterone (Halotestin) | Nandrolone Phenylpropionate (NPP) |
| Category | Anabolic Steroids | Anabolic Steroids |
| Status | FDA-approved drug (controlled substance) | Prescription drug (controlled substance) |
| Mechanism | 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. | Same active hormone as Deca (nandrolone) but with a shorter phenylpropionate ester, giving quicker onset and faster clearance. Acts on androgen receptors with high anabolic and reduced androgenic activity. |
| Molecular weight | 336.4 Da | 406.6 Da |
| Half-life | ~9 hours | ~2.5-4.5 days |
| Bioavailability | Oral | Intramuscular injection |
| Typical dose | Medical: ~2.5-20 mg/day | Variable; more frequent than Deca |
| Frequency | Daily | Every 2-3 days |
| Route | Oral tablet | Intramuscular injection |
Fluoxymesterone reported benefits
- Rapid strength gains
- Increased aggression/drive
- Red blood cell stimulation
- No added water weight
Nandrolone Phenylpropionate reported benefits
- Lean mass gains
- Faster onset than Deca
- Faster clearance (flexibility)
- Reputed joint comfort
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Research and educational reference only. Not medical advice.