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Since norbolethon was relatively unknown for a long time and was not commercially available, the doping tests performed in the performance port were not tested for the presence of the substance. The use of this highly anabolic substance in the performance sport therefore offered for a long time a possibility of the performance increase without detection in dopingtests. Norbolethon was first detected in 2002 by Don Catlin, then director of the Olympic Analytical Laboratory in Los Angeles. It is rumored that Norbolethon is nowadays manufactured in laboratories around China and Europe.

Norbolethon is an anabolic steroid developed in the Wyeth Laboratories in Philadelphia. The Synthetesis was described in 1966. However, Norbolethon was never further developed to the market. Today, isolated preparations are only available from Home Brewers.

Side effects:

Gynecomastia, prostate enlargement, males in women, low voice, decrease in testicular size, libido disorders, fertility, hypertension, irritability, increased aggressiveness, paranoia, depression, euphoria, acne, hair loss

On the doping list since:


Application / dosage:

The dosage would be between 5-10mg / day. In tests, doses of 7.5 mg / day had the best efficiency. Doses above 10 mg per day showed no appreciable improvement. The duration of use would be between 4-8 weeks per cure.

The dosage information given here is not intended as a dosage recommendation or medical advice. These are statements by bodybuilders who have used or used these active ingredients. The dosages should never be regarded as generally valid. If you are using the idea of using steroids or similar, ask a doctor or pharmacist.

Black market prices / availability:

Norbolethon is a very rare steroid and hardly available on the black market.


Genabol, Norboleton, Norbolethon, WY3475, Norbolethona, Norbetholonum

Trade Name / Manufacturer:

The drug has never been developed to market and is not commercially available. Also, no underground laboratories are known that produce norbelothone. Genabol was a planned product, but was never approved for trading.

Chemical information: Norbolethon - Norbolethone - Molekularformel

Molecular Formula: C21H32O2
Molecular weight: 316.48 g / mol
Monoisotopic mass: 316.240234 Da

(8R, 9S, 10R, 13S, 14S, 17S) -13.17-Diethyl-17-hydroxy-1,2,6,7,8,9,10,11,12,13,14,15,16, 17-tetradecahydro-3H-cyclopenta [a] phenanthren-3-one