Dextromethorphan ... to treat cough caused by irritation to your throat and airways, such as from a common cold. Dextromethorphan is available as the brand-name drugs Robitussin and Delsym.

You go in the bathroom (butt) You take 20 pills of DXM. You just go back to class ... It would be like, "Oh yeah he needs some cough medicine" but I didn't plan on taking the normal dose.