Bags of Halls Cough Drops are buy one get one 50% off this week at Walgreens. The BOGO 50% off sale double dips with a $1.99 monthly sale price. Buy two bags and use a $1.00/2 coupon from the 2/7 Smart Source insert. After shopping, submit the receipt to Checkout 51 and earn $1.00. The final price is $0.49 per bag!