Clenpenterol Products | Cleanchem - Clenpenterol is a beta-adrenergic agonist used primarily as a bronchodilator to treat respiratory conditions such as asthma and chronic bronchitis. It works by stimulating beta-2 receptors in the lungs, leading to the relaxation of bronchial smooth muscles and improved airflow. Clenpenterol is also used to improve the growth and feed efficiency in livestock, particularly in the pork industry. Side effects may include tachycardia, anxiety, and tremors.