Novocrine - Clenbuterol is commonly considered as an anabolic steroid, but in actual fact is a thermogenic stimulant. It is a drug that acts on the sympathomimetic central nervous system and belongs to the same drug group as Albuterol, Ephedrine, and Caffeine. Clenbuterol acts on the body’s andrenoreceptors, hence why it’s commonly known as Beta-2 agonist.You may know Clenbuterol more for its potent fat burning effects. The drug is widely used by both men and women with various backgrounds – from those with excess weight to bodybuilders participating in competitions.