I can't find this posted, so here it is. The Rolaids are giving 2 ECB this month, limit 5. The small packs (12 ct chews or 3 roll packs) were on the shelf today at my CVS for 2.49/pk. You could do a deal like this:

(5) Rolaids - 12.45
(2) Zantac 8 ct - 10.38

Use 2 of the 5/1 Zantac from Walgreens.com - Online pharmacy & drugstore, prescriptions, health information, photo center and the 4/20 that just came out (if you didn't get it, you can use the 3/15 from washingtonpost online).
So, it would be $22.83 - $14 = 8.83 oop (use ECBs if you have them). And, you'll get back $10 ECB. Not a huge moneymaker, but it works!