US health officials Friday ordered the makers of the Plavix anti-blood clotting agent to add a boxed warning to its packets saying the drug may be less effective in preventing heart attacks in people who cannot metabolize it properly. The new boxed warning ordered by the Food and Drug Administration is a further step up from just mentioning the drawback ...

The Food and Drug Administration is adding its strongest warning to the label for Plavix, cautioning that some patients do not respond to the blockbuster blood thinner. The FDA said in a statement Friday that certain patients with a genetic variation cannot metabolize the drug ...

US health officials Friday ordered the makers of the Plavix anti-blood clotting agent to add a boxed warning to its packets saying the drug may be less effective in preventing heart attacks in people who cannot metabolize it properly. The new boxed warning ordered by the Food and Drug Administration is a further step up from just mentioning the drawback ...