Cimaterol Products | Cleanchem - Cimaterol is a beta-adrenergic agonist used primarily in veterinary medicine to improve growth rates and feed efficiency in livestock. It works by stimulating beta receptors to increase protein synthesis and reduce fat deposition. Cimaterol has been studied for potential use in humans for enhancing muscle mass, though its use is limited. Side effects can include tachycardia (increased heart rate) and hypertension in both animals and humans.