A better alternative might be to see if your insurance company has a prescription-by-mail program. Many do, especially if you have flat-rate prescription coverage.
These are generally limited to medications that you take regularly, like birth control pills or medicine for high blood pressure or diabetes. If your insurance company has a contract with a mail-order pharmacy, refills will simply be mailed to you.
A major advantage of this system is not having to wait in line at the pharmacy every month. In fact, a lot of times you can get a three-month supply at once! There is also often a discount - you get a three-month supply for just two months' copay. My old insurance company had this and my new one does not, and I miss it!