乙醯半胱氨酸

Also known as N-acetylcysteine, NAC, (2R)-2-acetamido-3-sulfanylpropanoic acid, (2R)-2-acetylamino-3-sulfanylpropanoic acid, (R)-2-acetylamino-3-mercaptopropanoic acid, N-acetyl-L-(+)-cysteine, L-acetylcysteine, (R)-mercapturic acid

Acetylcysteine or '''N-acetylcysteine (NAC'; not to be confused with N''-acetylcarnosine, which is also abbreviated NAC) is a mucolytic that is used to treat paracetamol (acetaminophen) overdose and to loosen thick mucus in individuals with chronic bronchopulmonary disorders, such as pneumonia and bronchitis. It has been used to treat lactobezoar in infants. It can be taken intravenously, orally (swallowed by mouth), or inhaled as a mist by use of a nebulizer. It is also sometimes used as a dietary supplement.