Walmart started it, but a lot of other retailers jumped on the bandwagon. I was at the doctor's last week, and they had a thick sheaf of documents showing where you could get $4 prescriptions. And they were willing to give you one of those instead of something more expensive if it was a reasonable alternative.
I suspect that a lot more drugs will show up on those lists. Another example where the free market trumps gov't intervention.
Yep. I switched. Tired of paying co-pay at CVS for a $4 OR LESS drug at Walmart.