This is only in USA, as far as I know, but . . .

"Wal-Mart expands low-priced drug program

The world's biggest retailer offers 90-day prescriptions for $10 and more than 1,000 OTC drugs for $4 or less...."

http://money.cnn.com/2008/05/05/news...ex.htm?cnn=yes

Here are some more good links:

Walmart pharmacy info:
http://www.walmart.com/catalog/catal...PageCatId=5431

$4 list of script drugs:
http://i.walmart.com/i/if/hmp/fusion..._drug_list.pdf
(this is a PDF file)

$4 list of OTC drugs:
http://i.walmart.com/i/if/hmp/fusion/OTC_drug_List.pdf

TARGET does $4 drugs too, and if Walmart is expanding their list, Target might too.

Targets $4 list:
http://sites.target.com/site/en/heal...jsp?sort=alpha

Cherie