Teens have taken to “robotripping,” a woozy type of high caused by drinking cough syrup. The active ingredient in several major cough syrups, dextromethorphan (or DXM), is responsible for the intoxicating effects — and even a chemical dependency in some cases. Codeine cough syrups, which are even more potent, were recently taken off the shelves because of how dangerous they are — but teens can still get them from somebody with a prescription.