Clenbuterol is a nonsteroidal drug that has steroid-like effects. It helps relax the muscles and airways and was originally used as a bronchodilator to treat lung diseases such as asthma and chronic obstructive pulmonary disease (COPD).

Over the years, studies have shown that the use of clenbuterol may improve stamina and increase metabolism, thereby increasing the rate of fat burning while reducing muscle damage during intensive physical exercise. It prevents the body from getting fatigued by increasing endurance and performance. Therefore, the use of clenbuterol has become popular among athletes, bodybuilders, and gym enthusiasts.