Trenbolone
Trenbolone is an anabolic steroid used by veterinarians on livestock to increase muscle growth and appetite. To increase its effective half-life, trenbolone is not used in an unrefined form, but is rather administered as trenbolone acetate (Finaplix Gold from Valopharm USA, TREMBLONA QV75 from Quality Vet, Mexico), trenbolone enanthate or trenbolone cyclohexylmethylcarbonate (Parabolan from Laboratoires NEGMA until 1997). Trenbolone is then produced as a metabolite by the reaction of these compounds with the androgen receptor.
Illicit Use
No trenbolone compounds have been approved by the FDA for human use, due to a lack of clinical applications and considerable negative side-effects. It is classified as a Schedule III drug under the Controlled Substances Act. However, bodybuilders have been known to use the drug illicitly in order to increase body mass more effectively than by weight training alone. A normal bodybuilding dosage can range from 200 mg/week up to 500 plus mg/week. Due to the relatively short metabolic half-life of trenbolone acetate, dosages should commonly be split into injections at least once every two days. Trenbolone enanthate can be injected once a week.