Pharmaqo Labs Halotestin (Fluoxymesterone) 10mg is the most powerful oral strength compound available, producing dramatic increases in aggression, power output, and neural drive without significant weight gain. Halotestin has an anabolic rating of 1,900 and an androgenic rating of 850, making it the most androgenically potent steroid in existence. Despite these ratings, it does not produce proportional muscle mass. Instead, it works primarily through the central nervous system, increasing neural drive, aggression, and the ability to recruit maximum motor units during heavy lifts.
Who Uses Halotestin
- Powerlifters: 10-20mg 30-60 minutes before a max-effort session or competition for acute strength and aggression
- Bodybuilders (pre-contest): 10-20mg/day in the final 2-3 weeks for muscle hardening and density without water gain
- Fighters/combat athletes: aggression and power enhancement without weight gain (staying within a weight class)
Suggested Protocol
- Acute use (training/competition): 10-20mg taken 30-60 minutes before the session
- Daily protocol: 10-20mg/day for 2-4 weeks maximum. Halotestin is among the most hepatotoxic oral steroids
- Liver support: TUDCA 500mg/day mandatory. No alcohol
- Never exceed 4 weeks. Liver enzyme elevations are rapid and severe
Side Effects (Significant)
- Liver toxicity: very high. One of the most hepatotoxic oral steroids. Short cycles only
- Aggression: pronounced. Can be beneficial in the gym but requires self-awareness outside it
- Hair loss: extreme androgenic activity accelerates male pattern baldness rapidly
- Cholesterol: significant HDL suppression
- Not for beginners. Not for intermediate users. Advanced only
Key Facts
- Active ingredient: Fluoxymesterone 10mg
- Manufacturer: Pharmaqo Labs
- Anabolic / Androgenic: 1,900 / 850
- Half-life: 6-9 hours
- Aromatisation: none
- C17-aa: yes (very high liver toxicity)
Browse all Pharmaqo products. For less extreme strength options, see Anadrol 50mg.



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