Each GP Clen tablet contains 40mcg of Clenbuterol Hydrochloride. GP Clen is available in a sachet of 100 tablets. GP Clen is commonly given to patients with some type of breathing disorder. The doctors prescribe this drug as a bronchodilator and decongestant. Those suffering from asthma or any other chronic breathing disorder turn to this drug since it can help them breath much easier. The substance helps by stimulating the CNS (central nervous system), enhancing blood pressure and transportation of oxygen in the body, and expanding aerobic capacity. When the drug is taken, the rate of fat and protein metabolism increases, while the rate of glycogen storage decreases. The drug can also help smoothly relax the muscles.