If you don't have enough Theraflu yet (click here to see about getting some free), you can still get some manufacturer's coupons! Today I was at the Walgreens on Sunnyside Rd. and they had blinkies (those little coupon machines on the shelf where only 1 comes out at a time) with $1.50/1 coupons.
Use two $1.50/1 plus the $2 off Healthy Savings Booklet (available in-store) to get two of the $5 bottles of Theraflu liquid for $3. Then get a $3 rebate.
Net = FREE