Fluoxymesterone (Halotestin)
A potent 17-alpha-alkylated oral androgen prized for raw strength and aggression rather than size. It carries a very high hepatotoxic burden.
- Half-life
- 9 h
- Out of system
- ~1.9 days
- Route
- Oral
- Level
- Intermediate
Short-acting — protocols usually dose daily. After the last dose, roughly 97% has cleared in ~1.9 days (five half-lives) — the window that matters for washouts, bloodwork and surgery.
What Fluoxymesterone (Halotestin) is used for
- Delivers pronounced strength and aggression without much added weight
- Fast-acting oral often used in the final push before a competition
- Improves the sense of muscular hardness and intensity
How it's typically used
Anecdotal user reports describe roughly 10-20 mg daily for brief periods, framed as reported practice and not a recommendation.
What to watch for
- One of the most hepatotoxic oral steroids — serious liver strain
- Sharply worsens cholesterol and can spike blood pressure
- Aggression and mood swings are commonly reported
- An unapproved anabolic steroid and controlled substance; illegal without a prescription in most countries
About Androgens & steroids
- What they are
- Anabolic-androgenic steroids — testosterone and its derivatives. These are drugs, not peptides, and are controlled substances in most countries.
- How they're run
- Injected intramuscularly or subcutaneously on a schedule set by the ester's half-life; a few are oral and hepatotoxic.
- What to watch
- Every one of these shuts down your own testosterone production. Full bloodwork before, during, and after is not optional, and an exit plan — PCT or ongoing replacement — is part of the decision to start, not an afterthought.
Full guide
Halotestin (Fluoxymesterone): A Tracking Guide for a Potent Oral Androgen
A harm-reduction look at fluoxymesterone, a strong oral steroid used pre-competition for strength and aggression, with honest framing of its liver and lipid risks.
Other androgens & steroids
Peptid AI is an educational and self-tracking tool — not a medical service, and not a vendor. Nothing here is medical advice, a prescription, or an endorsement. Doses reflect what is commonly reported in research literature; they are not recommendations. Many compounds listed are experimental, not approved for human use, and/or controlled substances that are illegal to possess without a prescription in many countries. Always consult a qualified physician before starting, changing, or stopping any protocol.