I don’t know about coupons, but I get great price breaks from Amazon when I buy things like Prilosec on a monthly subscription basis. The more items you buy on a set subscription, the greater discount you get.
you need to go off prilosec (or any antiacid) and start taking magnesium :) buy metagenics brand mag on amazon. take 4-8 tabs/day split with meals and you’ll be amazed at how you feel. your acid indigestion will go away. antiacids block the absorption of magnesium which is a crucial mineral.