This is the clearinghouse for all the deals!
If you find an offer for a drug, the savings CAN BE applied to your co-pay. How do I know? Every month when I renew the various prescriptions for my family, I first go to this site to print out whatever drug coupons I can find listed. Not all prescriptions have offers, and hopefully if you have a generic it is already inexpensive. I have found over 60% of my name brand drug prescriptions have offers from their parent company, and I find them listed here. I find this to be cheaper than the mail order pharmacy my drug insurance uses, the offer me 3 month of drugs at a time, it is cheaper for me to purchase monthly with these coupon savings!
Follow the directions, print out the form, and take to your pharmacy before you pay. Of course there is also a long list of non-prescription drugs that have current offers/coupons, you can find them listed here as well!
http://www.internetdrugcoupons.com/ is a paid advertiser on my site. FYI, I was a big proponent of this deal before I became a paid spokesperson!