Clenbuterol

Clenbuterol (Spiropent, Ventipulmin) is a sympathomimetic amine used by sufferers of breathing disorders as a decongestant and bronchodilator. People with chronic breathing disorders such as asthma use this as a bronchodilator to make breathing easier. It is most commonly available as the hydrochloride salt clenbuterol hydrochloride.

Clenbuterol is approved for use in some countries (via prescription only) as a bronchodilator for asthma patients. Recently though, the drug has been publicized for its off-label use as a weight loss drug, similar to usage of other sympathomimetic amines such as ephedrine. It is commonly used as a slimming aid despite lack of sufficient clinical evidence supporting such use.

Clenbuterol has also been used as a performance-enhancing drug. In 2010, a number of athletes were banned after using the drug,

Its effects are more potent and longer-lasting as a stimulant and thermogenic drug. It causes an increase in aerobic capacity, central nervous system stimulation, and an increase in blood pressure and oxygen transportation. It increases the rate at which fats are metabolized, simultaneously increasing the body's BMR.