Head over to Coupons.com where you can get a rebate form for a $5 rebate when you purchase a Theraflu Product. There are lots of ways that you can use this rebate, but if you want to hold it for a few weeks, you can use it to get some for free!
Starting the week of 1/1/12, Walgreens will have Theraflu Warming Relief Syrup or Caplets for $4.99
File for the $5 Theraflu rebate (under Healthcare)
Final Price: Free!
Usually I would tell you that you could use a coupon to turn this into a moneymaker, but the fine print says that this rebate cannot be combined with coupons. Rebate ends 3/31/12.
(Thanks Wild For Wags!)