it was not codeine, it was dextromorphan. dextromorphan is a non competitive nmda receptor agonist, which blocks certain brain channels, causing changes in perception and feeling but is much less potent than codeine or some sort of opiate. also almost every dxm overdose happened when it was mixed with alcohol. I never used any alcohol with dxm. I also know what doses are safe, how long they last, and what to do if they get out of control.