There is a new Advil or Thermacare coupon for $3 off 2 packs. The coupon I printed does not have any restrictions on size so you should be able to find the little travel packs for free with coupon or for very cheap.
The only catch is that you need to either like the coupon on Facebook or email it out to 3 friends to get that $3 value. Otherwise the coupon is $1.00 in value.
I just emailed it to myself and that worked fine.
You can find more coupons you might need in the coupon database.