Clenbuterol is not an anabolic steroid, but rather a stimulant that belongs to a classification of compounds known as sympathomimetics. Clenbuterol’s original use as a medicine in the prescription drug market was (and still currently is) as a bronchodilator in the treatment of asthma. Upon activation of beta-2 receptors in the cell lining of the bronchial tubes, it initiates bronchial dilation (the opening and expanding of the airways) in the lungs, nose, and throat.
In bodybuilding clenbuterol is most commonly utilized in cutting, pre-contest, and fat loss cycles. Clenbuterol can bind to receptors on fat cells and initiate lipolysis. This effect involves its interaction with beta-2 adreno-receptors in fat tissue.