Acetylcysteine (rINN) (IPA: ), also known as N-acetylcysteine (abbreviated NAC), is a pharmacological agent used mainly as a mucolytic and in the management of paracetamol overdose. For these indications, acetylcysteine is available under the trade names ACC (Hexal AG), Mucomyst (Bristol-Myers Squibb), Acetadote (Cumberland Pharmaceuticals), Fluimucil and Parvolex (GSK).