New guidelines for knee and hip replacements issued

New clinical treatment guidelines for preventing blood clots after hip or knee replacements emphasize preventive measures and caution against post-operative ultrasound tests.

FDA places black-box warning on blood thinner Plavix

The Food and Drug Administration Friday placed a black-box warning—its most severe safety labeling—on the blood thinner Plavix. In a statement, it said that the drug could put certain patients at increased risk for heart attack and stroke.