Actually, you don't necessarily have to show your ID. That happens in some places where it may be abused in that locale. (I was asked for ID once in another province. The purpose is so that you aren't buying excess amounts of it. You'll have to wait a certain number of days before you can buy it there again! I was amazed, been using the stuff occasionally for years and never experienced this in other provinces.) You are only supposed to buy it if your doctor told you to get it. However, no one checks that requirement.

Also, it's only up to Tylenol 2 that is OTC. These have 8 mg of codeine as well at 15 of caffeine. T3 I have been given a prescription for after surgery. They aren't given out casually, so probably not T4 either! T3 has 30 mg codeine, so like 4xT2, but nothing about caffeine on the prescription label. If I need those one day, there are a few left. Good to take something for constipation with them, unless you like pooping out gravel! Wish the hospital had told me that!