An investigation by the Hearst Corporation says an estimated 200 thousand Americans will die this year from preventable medical errors and hospital infections. Heart dubbed its report, “Dead by Mistake.”

When it comes to losing weight, we’d all love that quick fix: a pill, shake, heck, even surgery to ease our efforts. Unfortunately, weight-loss aids—even when approved by the Food and Drug Administration—come with risks as well as benefits.

The U.S. Food & Drug Administration is gearing up to make critical decisions about two controversial vaccines. On Sept. 9 an FDA advisory committee will consider whether Merck (MRK)’s Gardasil, given to girls to prevent cancer-causing human papilloma...

In the longest-term study of its kind, researchers pitted two popular diets head-to-head — a low-fat American Heart Association-style diet and a carb-controlled Mediterranean diet, each combined with regular physical activity — in a population of...

The multiple sclerosis drug Tysabri awakens a virus that causes a rare brain disease, not only suppressing the body’s ability to fight it but making the virus stronger, U.S. researchers reported on Wednesday.