Additional information Water Retention No Hepatotoxicity High Aromatization No Lab Test Liver function tests Also known as Fluoxymesterone Drug Class Androgen; Anabolic Steroid Blood pressure Perhaps Liver toxicity High Trade name Halotestin, Ultandren Storage conditions Store at room temperature away from moisture and heat Chemical name 9-fluoro-11,17-dihydroxy-17-methylandrosta-1,4-dien-3-one Formula C20H29FO3 Substance class Anabolic-androgenic steroid Main action Increase in lean muscle mass and strength Half-life Approximately 9.2 hours Dosage (medical) 5-20 mg per day Dosage (sports) 10-40 mg per day Effects Increases strength, enhances muscle density, improves aggression Side effects Liver damage, aggression, acne, changes in blood lipids, masculinization (in females) Use in sports Used by athletes in sports requiring strength and where weight categories are involved