Avandia, the widely used diabetes drug got a new warning label. The drug's package will now tell patients it may, or may not, increase the risk of heart attacks.
It's confusing but the Food and Drug Administration says studies are too contradictory to tell for sure if Avandia really is riskier than other diabetes medications.
Still, the FDA put the controversy in a black box on the drug's label.
That's the most severe warning.