Many chain pharmacies such as Rite Aid, Hannaford (a supermarket in NE), etc., have prescription discount plans that you can join. They have a list of common drugs that can be purchased for a base price, such as 5 or 10 dollars per month, depending on 30 or 90 day supply. I researched online and called around locally when I got my prescription for E and S, and found that I could fill it locally at Hannaford for $23 a month. My first month before I'd done this had cost considerably more.
Shana