How to Make Dxm?

DXM (Dextromethorpan), also known as dex or robo, is a cough-supressing ingredient in a variety of cold and cough medications. Prolonged use can cause hallucinations and intense paranoia. Abusing DXM is potentially deadly. Never exceed 20mg/kg (or 2000mg, whichever is lower) of DXM under any circumstances.