Jump to: navigation, search

Clinical data
SynonymsNorbolethone, Genabol
CAS Number
PubChem CID
E number{{#property:P628}}
ECHA InfoCard{{#property:P2566}}Lua error in Module:EditAtWikidata at line 36: attempt to index field 'wikibase' (a nil value).
Chemical and physical data
Molar mass316.47758 g/mol

WikiDoc Resources for Norbolethone


Most recent articles on Norbolethone

Most cited articles on Norbolethone

Review articles on Norbolethone

Articles on Norbolethone in N Eng J Med, Lancet, BMJ


Powerpoint slides on Norbolethone

Images of Norbolethone

Photos of Norbolethone

Podcasts & MP3s on Norbolethone

Videos on Norbolethone

Evidence Based Medicine

Cochrane Collaboration on Norbolethone

Bandolier on Norbolethone

TRIP on Norbolethone

Clinical Trials

Ongoing Trials on Norbolethone at Clinical

Trial results on Norbolethone

Clinical Trials on Norbolethone at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Norbolethone

NICE Guidance on Norbolethone


FDA on Norbolethone

CDC on Norbolethone


Books on Norbolethone


Norbolethone in the news

Be alerted to news on Norbolethone

News trends on Norbolethone


Blogs on Norbolethone


Definitions of Norbolethone

Patient Resources / Community

Patient resources on Norbolethone

Discussion groups on Norbolethone

Patient Handouts on Norbolethone

Directions to Hospitals Treating Norbolethone

Risk calculators and risk factors for Norbolethone

Healthcare Provider Resources

Symptoms of Norbolethone

Causes & Risk Factors for Norbolethone

Diagnostic studies for Norbolethone

Treatment of Norbolethone

Continuing Medical Education (CME)

CME Programs on Norbolethone


Norbolethone en Espanol

Norbolethone en Francais


Norbolethone in the Marketplace

Patents on Norbolethone

Experimental / Informatics

List of terms related to Norbolethone

Norbolethone (Genabol) is an anabolic steroid. It was first developed in 1966, and tested for use as an agent to encourage weight gain and for the treatment of short stature, but was never marketed commercially. It subsequently showed up in urine tests on athletes in competition in the early 2000s.[1]

Norbolethone was found to have been brought to the market by the chemist Patrick Arnold, of the Bay Area Laboratory Co-operative (BALCO), an American nutritional supplement company. It is reputed to have been the active ingredient in the original formulation of the "undetectable" steroid formulation known as "The Clear" before being replaced by the more potent drug tetrahydrogestrinone.[2][3]


  1. Catlin DH, Ahrens BD, Kucherova Y. Detection of norbolethone, an anabolic steroid never marketed, in athletes' urine. Rapid Communications in Mass Spectrometry. 2002;16(13):1273-5.
  2. "Chemist Who Created "The Clear" Sentenced" (Press release). United States Attorney for the Northern District of California. 2006-08-04. Retrieved 2007-10-08.
  3. Knight J. Drugs bust reveals athletes' secret steroid. Nature. 2003 Oct 23;425(6960):752.