Dragon Pharmaceutical Inc. is an international biopharmaceutical corporation engaged in the discovery, development and commercialization of genetically engineered human proteins for therapeutic use. Based on its proprietary protein expression technology, Dragon believes that it has become one of the world’s most competitive producers of Erythropoietin (EPO) a breakthrough drug that has revolutionized the treatment of anemia. Dragon is also applying its platform technology to the development of other generic and novel protein drugs.
After the Kefauver Harris Amendment was passed in 1962, the . FDA began the DESI review process to ensure the safety and efficacy of drugs approved under the more lenient pre-1962 standards, including Dianabol.  In 1965, the FDA pressured CIBA to further document its legitimate medical uses, and re-approved the drug for treating post-menopausal osteoporosis and pituitary-deficient dwarfism .  After CIBA's patent exclusivity period lapsed, other manufacturers began to market generic metandienone in the .
Note that in androgen-responsive target tissues such as the skin, scalp, and prostate, the relative androgenicity of nandrolone is reduced by its reduction to dihydronandrolone (DHN). 438 439 The 5-alpha reductase enzyme is responsible for this metabolism of nandrolone. The concurrent use of a 5-alpha reductase inhibitor such as finasteride or dutasteride will interfere with site-specific reduction of nandrolone action, considerably increasing the tendency of nandrolone to produce androgenic side effects. Reductase inhibitors should be avoided with nandrolone if low androgenicity is desired.