Fyi customs on either side of the border cant fuk with you over buying tylenol 2's in canada to bring back into the states,as long as they were legaly obtained by you from a medical professional then they let you pass straight on through,be sure to keep your recipt & have it handy for inspection.
Tylenol 2's are kept behind the counter in canada so it requires a pharmacist or pharmacy assistant to sell them to you therefore you obtained them by legal means.
Ive been down that road before.