Regulations applying to Clenbuterol

Letter from the UCI


Due to recent enquiries from some of our National Federations, teams and riders we are writing to you to remind you of the regulations applying to clenbuterol.


The presence of clenbuterol in a sample constitutes an anti-doping rule violation under the WADA Code as implemented in the UCI Anti-Doping Rules. Clenbuterol is an anabolic agent, has been on the WADA Prohibited list since 2004 and there is no threshold under which it is allowed.

Because clenbuterol is a 'non-specified' substance on the Prohibited List a provisional suspension is mandatory as soon as an athlete is notified of a positive finding.

China and Mexico

It is widely acknowledged that there is a risk of meat contaminated with clenbuterol leading to a positive sample in an athlete. WADA has specifically drawn attention to this problem in China and Mexico.

As a consequence the athletes who are under our care at the World Cycling Centre in Switzerland have been told that they should not eat meat in these countries. We believe that as a matter of caution you should consider giving this advice to all your athletes.

Signed: Brian Cookson - UCI President

Read the UCI letter here