The FDA is reviewing the safety of Vytorin, which combines the cholesterol-lowering drugs Zocor and Zetia, after a clinical trial SEAS revealed that 4.1% of patients taking the drug died of some form of cancer. Although the impact is small, the FDA has alarmed doctors and patients about it. Meanwhile it has asked the manufacturers for further data. However, the FDA and the American Heart Association have said that the patients should not stop taking Vytorin or any other cholesterol drug as that may add to the risk of having a heart attack.