Hi Barbs,

Basically here in western Canada we can stack our coupons at London Drugs. You may use multiple coupons for the same purchase so long as all the coupons have different UPC's, are valid in Canada, have not expired, are for the correct product, and do not go over the price of the item. Sometimes they will let us go over by a cent or two if you get a nice cashier. Also if you shop at Superstore you can combine their zone" coupons (found in the front entrance of the store) with one manufacturer coupon per purchase for extra savings. Hope this helps, and if you have any more questions feel free to ask!