Per frugal guru Clark Howard..
“If you look on GoodRx, the cheapest place to fill a prescription drug consistently is Costco Wholesale,” Clark says. “And Costco has to let you fill a prescription even if you’re not a member.”
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Also checked and different places only charge $4/month for many generics. Looked mine up and WalMart charges $10 for a 90 day supply. Definitely will not be using my insurance for this.
YLMV