Clenbuterol is a bronchodilator that is prescribed to patients with breathing disorders. However, as a side effect it can also cause substantial weight loss in the administered patient. This is the point of abuse as athletes and bodybuilders who wish to lose weight fast and gain a muscular physique unethically use the product. It is legally banned for commercial sale and use. It can be only administered to patients under doctor’s advice through a hard prescription. Yet this steroid is abused by fitness enthusiasts as it helps increase lean muscle mass and reduce body fat quickly.