Drug makers have tripled the prices of top Medicare drugs

The exorbitant price hikes of the top 25 costliest drugs for Medicare Part D plans.

Key points:

1. The price hikes of these drugs have more than tripled their list prices since entering the market.
2. The price increases far outstripped the rate of inflation, ranging from 20 percent to 739 percent.
3. Only one drug had price increases below the rate of inflation, while the average lifetime price increase for the top 25 drugs was 226 percent.