Save over 58% on comparable drugstore prices when you stack coupons at Dollar General. Stacking, one of our favorite KCL strategies, is when you use a manufacturer coupon and a store coupon on one item. While you cannot use more than one manufacturer coupon on an item, many stores have their own coupons and allow you to use them in conjunction with the manufacturer coupon. Think of the store coupon like a reduction in the sales price and the manufacturer coupon as part of your payment. Print the Dollar General store coupon below, grab the coupon from the 8/24 Red Plum (or print from various sources below), and pick up two boxes of Advil PM for the price of one!