Stack a Target mobile coupon with a printable coupon to score FREE DulcoGas Chewable Tablets! Since this coupon is a manufacturer’s coupon, it can be used anywhere, not just at Walgreens.Stack a Target mobile coupon with a printable coupon to score FREE DulcoGas Chewable Tablets! Since this coupon is a manufacturer’s coupon, it can be used anywhere, not just at Walgreens.