Pro-Clenbuterol 40 mcg 50 tabs is a medication used to treat chronic obstructive pulmonary disease (COPD). It contains the active ingredient Clenbuterol Hydrochloride which is a β2-adrenergic agonist. This medication works by stimulating β2-receptors in the bronchial smooth muscle, allowing more air to enter the lungs thus relieving the symptoms of COPD. This medication is taken orally in tablet form and can be taken with or without food. It is typically taken twice daily.