Please ensure Javascript is enabled for purposes of website accessibility Clenbuterol Triggers Abnormal Heart Rhythms

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Clenbuterol is used to treat asthma and is very popular with bodybuilders because it increases muscle growth and cuts fat. It is a beta-2 agonist, which means that it has effects similar to the fight-or-flight hormone adrenaline. It is a popular drug with bodybuilders because it builds muscle, cuts fat and boosts energy levels. It builds muscle by promoting specific signaling pathways inside the cells that activate protein synthesis and modifies muscle protein breakdown, remodeling and repair. It decreases body fat by binding with the adrenaline receptors in fat cells, which promotes fat breakdown and release. Clenbuterol can have negative side effects on the heart and blood vessels. A Chinese study on rabbits found that clenbuterol caused low blood pressure and heart rhythm disturbances. Emergency room physicians in the United States and other countries have reported similar problems in humans. Clenbuterol is a potentially deadly drug, and bodybuilders shouldn’t mess with it. (Cardiovascular Toxicology, published online)