Consumer Reports bought bought Plavix, Levoxyl, Detrol, and Alendronate at a whole bunch of different pharmacies, and Costco came out the cheapest overall. Here's how the 13 places they tested rang up:

Costco $962
AARP.com $1005
Wal-mart $1073
Walgreens.com $1153
CVS.com $1177
Independents $1192
CVS $1205
Safeway $1207
Shopko $1209
Publix $1219
Hannafor $1226
Walgreens $1276
Rite Aid $1302

Costco sells nearly all their goods at close to cost, so their primacy is no surprise. Results may vary, but it shows you shopping around, even for drugs, makes for a healthier wallet.

America's best drugstores [Consumer Reports]
(Photo: Getty)