As a nurse, I can tell you that you can get generics that look nothing like the name brand and you can get a different generic each time so you can't always tell what you are getting. These big retail chain store pharmacies have to meet quota...a certain number of scripts per day. Many times, the person putting the meds in your bottles isn't a pharmacist but a tech. The pharmacist just checks the script and reads the label and hopes for the best.
Pay up Walmart...and change the way you do business. I avoid Walmart as much as possible.