This drug is widely used by bodybuilders as a weight-loss supplement, although it’s not FDA-approved for humans. However, there is little research showing the drug causes these effects in humans. In some countries, people take clenbuterol as an asthma or chronic pulmonary obstructive disorder (COPD) treatment. Taking higher doses of Clenbuterol buying experience or taking the drug for a longer period of time may increase the risk of serious adverse effects. Most people who experience poisoning need hospital treatment.