Today only (8/29), you can save 15% off your entire in-store or online purchase at Walgreens (or 20% off wyb Walgreens or Nice! brand products) with the Walgreens Friends and Family printable coupon. Or you can text FAMILY to 21525 to get the coupon sent to your mobile phone.
Make sure you give the cashier the coupon before ringing up your products or they will have to cancel the whole order (also in the past you were required to go to cosmetics or photo to check out).
