Acetylcysteine
（重定向自Fluimucil）
Acetylcysteine, also known as N-acetylcysteine or N-acetyl-L-cysteine (NAC), is a medication used to treat paracetamol (acetaminophen) overdose and to loosen thick mucus such as in cystic fibrosis or chronic obstructive pulmonary disease. It is available by intravenous, by mouth, or inhaled as a mist.