Over-the-counter substances Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! Nicotine Dextromethorphan Pages in category "Over-the-counter substances" The following 2 pages are in this category, out of 2 total. D DextromethorphanN Nicotine Retrieved from "http://psychology.wikia.com/wiki/Category:Over-the-counter_substances"