Many people in the US order from a Canadian pharmacy, Marks Marine Pharmacy in Vancouver, British Columbia. You'd have to fax a prescription from your vet to them once at the beginning. The best way to get the Lantus is in a 5 pack of pen cartridges, each of which is 3mL and can be used like a mini vial. That mini vial contains 300 units of Lantus so if you're dosing 2 units total per day, it should last about 150 days. The rest will keep well in your fridge until the package expiry date, usually 2 years down the line. The price is about half what you'd pay in the US.We would like to start our Cat on Lantus as it looks as if many of you are on this insulin. $299.00 is too expensive a month for us. Can you order thru a Canadian Pharmacy? Will it last longer than a month? Please advise. Thank you.