370 In the index

Fluoxymesterone Halo

A very strong oral steroid (brand name Halotestin) once approved for low testosterone and breast cancer, still used medically in limited cases today. Human studies confirm it's a powerful hormone, but it's harder on the liver and cholesterol than most other oral steroids, even at small doses.

Also known as Halotestin, Fluoxymestrone, Androfluorene, Androfluorone, Fluoximesterone, Fluotestin, Oratestin

Effects Build muscle

Routes Oral

Legal status Controlled substance

WADA Banned at all times

3D Molecular Structure of C₂₀H₂₉FO₃

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Chemistry

Formula: C20H29FO3
Molar mass: 336.4
CAS: 76-43-7
PubChem CID: 6446
IUPAC name: (8S,9R,10S,11S,13S,14S,17S)-9-fluoro-11,17-dihydroxy-10,13,17-trimethyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one
InChIKey: YLRFCQOZQXIBAB-RBZZARIASA-N

Reported dosing

User-reported

What has been reported in the literature and by users. This is a record of what is done, not a recommendation.

Typical dose 5-20 mg/day

Reported range 2.5-40 mg/day depending on indication

Route Oral

Frequency 1-2 times daily

Duration Chronic (medical use) or short cycles (off-label bodybuilding use)

FDA-approved androgen (Halotestin) for hypogonadism and certain breast cancers; off-label bodybuilding use is unsupervised and this compound carries a strong reputation for liver strain.

Where this comes from FDA prescribing information; off-label user-reported dosing

There is no approved human dosing for this compound. The figures above are what users and vendors report, not what has been established as safe or effective. Treat them as a record of what is done, not as guidance.