If you get all your meds at one pharmacy then that pharmacist is the best resource you can possibly have.
I got a new med from a new doc for pain and my pharmacist would not fill it. She told me it would have a bad reaction to my IBS plus I had a history of Ulcers in college and it was one of those meds that could not be taken in those conditions. I might have holes in my stomach that started bleeding and I could have died had I taken that prescription to any other pharmacy.
That's the main reason I hate using Walmart now, they have no personal connection to you, they have to be asked when you drop off a script and then you can know if there are any issues. I prefer a small family style pharmacy every time, but they can't often afford to do the $4.00 list.