You cannot use clenbuterol as a therapeutic drug, if you are living in the United States. Clenbuterol, commonly known as Clen, is the drug that is not approved for human use; it is only approved for horses in the United States.
The United States Food and Drug Administration approved the clenbuterol-based Ventipulmin Syrup, produced by Boehringer Ingelheim Vetmedica, Inc., as a prescription-only drug for the treatment of airway obstruction in horses (0.8-3.2 m g/kg twice daily) in 1998. Clenbuterol is not meant for human use or for use in food-producing animals. As of fall, 2006, clenbuterol is not an ingredient of any therapeutic drug approved by the U.S. FDA.
But, outside the U.S., clenbuterol is often used as prescription drug for the treatment of bronchial asthma in humans. It is used as a powerful, long-lasting bronchodilator and tocolytic in many countries of the world. It is available in tablets (0.01 or 0.02 mg per tablet) and liquid preparations.
However, clenbuterol is widely and generally used by bodybuilders and athletes for its ability to increase lean muscle mass and reduce body fat (i.e., repartitioning effects). It is commonly used for smooth muscle relaxant properties. It is often used for its ability to alter body composition by reducing body fat and increasing skeletal muscle mass. It is usually often used in combination with other performance enhancing drugs, such as anabolic steroids and growth hormone. However, clenbuterol is usually linked with significant adverse cardiovascular and neurological effects.
CHEMISTRY – Clenbuterol is a