Medication costs aren't set in stone. Recent findings published in the June issue of Consumer Reports show that the costs of medications can vary widely from store to store, even within the same chain of stores.

One hundred and sixty three pharmacies nationwide were contacted and asked the costs for three-month supplies of four common medications: Detrol, Plavix, Levoxyl, and a generic osteoporosis medication. The costs varied greatly -- Detrol ranged from $365-$551, Plavix from $382-$541, Levoxyl from $29-$85, and the osteoporosis medication from $124-$306. While some bigger chains, such as Costco, did prove to have the lowest prices overall, many small pharmacies were competitive.

As consumers, it's important to shop around. However, a good relationship with your pharmacist is also important. And, there are benefits to having one pharmacy that knows your prescriptions and can help detect potential problems.