Nicotinamide, also known as nicotinamide, is an amide compound of niacin. It is a white crystalline powder; Odorless or almost odorless, with a bitter taste; Slightly hygroscopic. It is readily soluble in water or ethanol and soluble in glycerol. It is mainly used clinically for the prevention and treatment of pellagra, stomatitis, glossitis, sick sinoatrial node syndrome, atrioventricular block and other problems.