My local Walgreens will allow you to stack a manufacturer coupon and a Walgreens coupon on one item, BUT they will not allow you to have more coupons than items in a transaction. So, in your situation you would need to have at least one other item in that transaction for which you did not have a coupon. I know that this week they have chocolate Easter eggs (butterfinger and nestle, maybe Cadbury) on sale for 29 cents, so if it were me, I would add one of those to the transaction and it would work out fine. Plus, you would have a little chocolate stashed away for Easter as long as you didn't eat it on the way home!