There are a few Theraflu Coupons on their site right now.
They are also offering a $5 Retail Store Gift Card with Theraflu Warming Caplets or Syrup Purchase. You can choose between Rite-Aid, Walmart, Kroger, Target, Walgreens or CVS for the gift card. See rebate for details. Note: You may not be able to apply for the gift card option if you use a coupon on the purchase.
Thanks, She Saved!