Dr. Eisenson answers the question: 'What Is Clenbuterol, How Does It Work?' February 1, 2009 -- Question: What is Clenbuterol, how does it work, and is it a safe and effective way to lose weight?

In some countries, doctors prescribe clenbuterol as a treatment for asthma or breathing difficulties. It is banned for use in humans in the United States. Clenbuterol is a type of drug known as a beta ...

Alberto Contador, the 2010 Tour de France winner, had his title taken away Monday after being found guilty of doping, specifically for testing positive for clenbuterol. The drug is a beta2-agonist ...

(CBS/AP) Clenbuterol is the new "it" drug for elite athletes looking to dope their way to victory. Though the fat-burning anabolic drug is a banned substance, it's turning up in the blood of some ...

The California Horse Racing Board took action on two separate measures to "deauthorize any detectable level of clenbuterol" in racehorses during its monthly meeting Oct. 25 at Santa Anita Park. The ...

LONDON -- A study by a German doping laboratory has found that humans can inadvertently ingest clenbuterol from eating meat, a finding that would support claims by Alberto Contador and other athletes ...

In the U.S., clenbuterol is a prescription medicine used to treat blocked airways in horses. In other countries, people are prescribed clenbuterol to treat asthma or breathing problems. The FDA has ...

— -- Mexican superstar Canelo Alvarez, who is in training for his mega rematch with unified middleweight world champion Gennady Golovkin, has tested positive for the banned substance clenbuterol.

The string of Mexican boxers testing positive for the banned substance clenbuterol has included superstar Canelo Alvarez, Luis Nery, Francisco Vargas and, in recent days, Rey Vargas and Julio Cesar ...