Clenbuterol is prescribed for treating bronchial asthma and other respiratory tract diseases with branchial obstruction. Recently though, the drug has been publicized for its off-label use as a weight loss drug. It is commonly used as a slimming aid despite lack of sufficient clinical evidence supporting such use. In fact, nowadays it is recommended by many physical trainers as the primary solution for those bodybuilders who desire to achieve sufficiently low body fat in order to look "cut".