by – Nilevar (norethandrolone) was synthesized and approved by G.D. Searle as the first orally-active anabolic steroid in 1956. Norethandrolone has moderate progestagenic activity. I don’t have information on whether Winstrol counteracts this, as appears to be the case with Anadrol, but in any case Nilevar is not considered a particularly useful drug for male bodybuilders. For female bodybuilders, it is probably an average synthetic, comparable to Dianabol. It shares the liver toxicity issues common to 17-alkylated steroids.
Nilevar probably has low conversion to estrogen (contrary to claims made elsewhere).
Norethandrolone is the chemical name of active ingredient in Nilevar. Nilevar was originally a registered trademark of Searle Laboratories in the United States and/or other countries prior to cancellation.