It’s only fair to share… Clenbuterol Clenbuterol hydrochloride, NAB-365, Siropent Clenbuterol, marketed as Dilaterol, Spiropent, Ventipulmin,[1] is a sympathomimetic amine used by sufferers of breathing disorders as a decongestant and bronchodilator. People with chronic breathing disorders such as asthma use this as a bronchodilator to make breathing easier. It is most commonly available as the …