One more thing, out of interest in covering this subject completely: there is actually one other option for getting an OTC codeine product in Canada. You can get a drug called Mersyndol (or something like that anyway) that also has APAP and codeine, but instead of caffeine it has an antihistamine (chlorpheniramine I think). This is better in the sense that you don't have a stimulant harshing your buzz, and not only that but antihistamines actually potentiate opiates rather than antagonize their effects. On the other hand, it would be far more unpleasant to make a CWE with this much antihistamine in it rather than caffeine.