Speculation that North Korea's Kim Jong Il may be seriously ill intensified Tuesday when the leader failed to appear at a parade marking the 60th anniversary of North Korea's founding.

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Pharmaceutical company Merck knew in 2001 that its arthritis drug Vioxx could harm patients and used staffers to "ghostwrite" favorable research on the drug, articles in the Journal of the American Medical Association report. Susan Dentzer examines the charges.

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A new study on Type 2 diabetes was partially halted after research showed lowering blood sugar levels for some high-risk patients increased their chances of dying from a heart attack. The head of the American Diabetes Association details the surprising…

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Supreme Court Chief Justice John Roberts, who was released from the hospital on Tuesday, is among 25 million Americans who have suffered from seizures. A neurologist describes the triggers and treatments of such conditions.

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Hormone therapy is safe for younger women to use in treating menopause symptoms, a new study in the Journal of the American Medical Association suggests. NewsHour health correspondent Susan Dentzer details the report's findings.

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Israeli Prime Minister Ariel Sharon was in serious but stable condition on a respirator in "deep sedation" Thursday after seven hours of surgery to remove blood from his brain following a hemorrhagic stroke.

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Israeli Prime Minister Ariel Sharon suffered a cerebral hemorrhage Wednesday and was on breathing assistance, his doctor told the Associated Press.

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Daily supplements of folic acid or foods fortified with the vitamin can help prevent heart disease, stroke and blood clots, according to a study published in the Nov. 23 issue of the British Medical Journal.

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