Before the canuks banned me from Canada i used to make runs from Detroit to Canada for the casino,on my way back home i'd pick up a couple thousand tylenols for the hell of it.
Go to any pharmacy & ask the employees,they will get them for you as they are kept behind the counter.
Keep in mind that they are 100% worthless for anything more than a small boo boo,they are only Tylenol #2's,at the border dont hide them,when they ask for any declarations make sure you tell them you have the medicine,if you dont declare them you can & most likely will be in for some serious shit.
By the time you pay for gas,tolls,figure in your drive time & the long ass wait at the border its cheaper to buy shit off the street that really works,tylenol 2's suck.