Walgreens has a corporate coupon policy here. Walgreens also is the only major drugstore without a loyalty card, but reportedly there is one coming soon.
In many ways Walgreens is the hardest drugstore to get the hang of. There are lots of subtle nuances and quirks that can be tough to figure out.
Walgreens allows the use of one manufacturer and one store coupon per item. Walgreens store coupons are called IVCs (Instant Value Coupons). At 99% of stores these must be scanned after all manufacturer coupons. If not they will 'attach' to the items and make the manufacturer coupons not work.
Walgreens reward program is called Register Rewards (abbreviated as RR here). These print from the Catalina machine attached to the register after your transaction. They can be used on anything in the store except for the few exceptions printed on the RR (dairy, stamps, tobacco). RR are manufacturer coupons and work the same way manufacturer coupons do.
First of all, these typically do not 'roll'. If you receive a RR for Colgate toothpaste, you usually can't buy another Colgate and get another reward.
Also, Walgreens requires you to have an equal number of items to coupons (including Register Rewards). IVCs do NOT count in that coupon total. Example:
You're buying 1 toothpaste and 1 candy bar. You have a coupon from the newspaper for both items, plus a RR you'd like to use. In order to use those three coupons, you'll need to add a 'filler' item. A filler is a small item that you add to an order to round it out so you can use a drugstore reward to pay for it.
Walgreens registers don't typically allow for coupon overage but if you have a deal that requires both an IVC and a manufacturer coupon you can sometimes get overage. Scanning the IVC last typically allows for overage. However, if a deal requires just a manufacturer coupon even $.01 overage will make the register beep. It's Walgreens policy to adjust coupon values down. They are not supposed to refuse these coupons outright.
