Travelling with Medical Cannabis
Medical Cannabis cannot be brought over any international border, even if it has been obtained legally and is accompanied by all relevant paperwork. Likewise you are not allowed to carry medical cannabis back to Canada. It is illegal to do so.
Domestic travel: You can legally travel with your medical cannabis within Canada. You must, however, keep the cannabis in the original packaging in which it was supplied and keep the receipts for your legal purchase.
CSTSA on Domestic Travel with Medical Cannabis