Note: This link will take you away from the Medicare section of the Priority Health website.
Some drugs will be approved for you only after you try other drugs first and they don't work for you. This approval requirement is called "step therapy," and the drugs that it applies to are called "step therapy drugs."
Step therapy drugs are identified in the 2012 Priority Health Medicare Formulary (425KB PDF, Form Y0056_5000_5001_14 File and Use 08122011). Here is a list of them for your convenience, also available in PDF format: Drugs that require step therapy (127KB PDF, Form Y0056_1009_1009_89 File and Use 12182011)
You need to install a Flash plugin to see this video.