N-acetylcysteine (NAC) for obsessive-compulsive disorder (OCD)?

This article was first published in September 2018. It was last updated on April 27, 2022. For a basic overview of what N-acetylcysteine (NAC) is, see What is N-acetylcysteine (NAC)? On this page, I will address the question: Does NAC work for obsessive-compulsive disorder (OCD)? What do practice guidelines and review articles say?  Earlier practice guidelines…