It's also important to remember that a drug company can only hold a patent on a medication for 20 years.
They must recoup 13-15 years of research and development costs plus make any profit in 5 to 7 years time.
Once the patent has run out, generic forms often pop up quickly, reducing the price for the consumer.
One estimate is that the price of simvastatin (Zocor) was to decrease by 90 percent when the patent ran out earlier this year.
Gail