Vioxx was pulled from the market last week after a study found it doubled the risk of heart attacks and strokes.
Vioxx had been doing a study to determine the outcome of using Vioxx on the preventing the recurrence of potentially cancerous polyps in the colon and rectum. What they found in the three year study however was that of the 1,287 people taking Vioxx, 45 had heart attacks or other cardiovascular problems. There was a control group of 1,299, of which 25 had heart attacks or cardiovascular problems.
Here is a website which contains more info: