The FDA and Pfizer have sent a warning letter to physicians advising them the antipsychotic drug Geodon is linked to high blood sugar and diabetes. The warning letter grew from an FDA investigation of six of the most widely used antipsychotic drugs and led to an instruction to the makers to revise their labels to reflect the dangers. The other drugs are AstraZeneca's Seroquel, Bristol-Myers Squibb's Abilify, Eli Lilly's Zyprexa, Janssen's Risperdal and Novartis' Clozaril.

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