We haven’t seen a storewide sale like this from Walgreens in more than a year. Today, Friday, August 28, the popular drugstore is offering friends and family 20% off an entire purchase of regular-priced items, with this printable coupon. (You can also show the coupon on your smartphone.) You must present the coupon at the beginning of checkout. The offer is only valid with a Balance Rewards membership. (If you’re not a member, it’s free to sign-up in the store.) Of course, there are the usual restrictions: Not valid on alcohol, dairy, tobacco, stamps, phone/prepaid cards, gift cards, money orders/transfers, transportation passes, lottery tickets, charitable donations, clinic services or prescriptions. See the coupon for a full review of the restrictions. If you can’t make it to the store, the offer also applies to online purchases made today with promo code FRIEND20. Now’s the time to stock up on those items that never go on sale!