This document provides information on dextromethorphan (DXM), including its short-term and long-term effects, risks of abuse and addiction, legal status, intended medical use as a cough suppressant, and prevalence of abuse. It notes that while DXM is legally available over the counter, abuse can cause negative health effects. The document also warns that some DXM-containing products may include other active ingredients like acetaminophen that can damage the liver in high doses.