The surgeon provided some medications and a prescription (powerful NSAID Ketorolac, antibiotics for preventing infection).
We were taken to a pharmacy where we could purchase medication and were provided a written prescription from the pharmacist for anything we bought.
I have a FAST Card, so I was very conscious of the risk of bringing pharmaceuticals without a prescription back across the border. We made sure we were totally covered, including a letter stating which anaesthetics were used (in case of a random urine screening, we would test + for both opiates and opioids from the morphine and fentanyl).
Everything you said is what is going through my mind. Fast pass, Passport, and HazMat for me. So lots of things I can lose driving a truck and having issues at the border with medication. Whether it be for good or not. Thanks again for the information. This will be the most beneficial thing for me.