Have you checked www.goodrx.com? It helps you find the cheapest price for meds based on zip code. Maybe you'll find it is cheaper at a different pharmacy.

Rx Outreach | Patient Assistance Program, Discount Prescription Drugs is also worth checking. I am on a crappy computer right now so can't look it up for you but they often have really good prices on meds; if you go to the website you can check the price. Often you can get a 3 month supply for 1 month's co-pay or better.