This may answer your question. You'll need a new prescription from your doctor to get the ball rolling. We easily used a Canadian Pharmacy for years before getting on Medicare prescription plan. Saved a LOT of $$.
Also check GoodRX to get a price on your prescription. Even with a prescription plan now we occasionally get it filled through GoodRX to save some money. Normally, any pharmacy in the U.S. can check GoodRX's price for you or you can do it online. We just ask the pharmacist at WalMart to check for us if the prescription we're picking up is expensive.
https://www.pharmacychecker.com/askp...ons-to-canada/