DXM (short for dextromethorphan) is an active ingredient in many over-the-counter cough medicines that helps to suppress your cough. Products containing DXM come in liquid form, tablets, and gel caps. When abused in large amounts, it can produce a “high” feeling as well as a number of harmful side effects, but when taken according to directions, products containing DXM produce few side effects and have a long history of safety.
