Many doctors may still be reticent to use the drug, whose side effects include nausea, headache and dizziness.

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Possible side effects include headache and nausea.

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In general, side effects of Byetta can include diarrhea, nausea, and vomiting, which may contribute to changes in kidney function, says Dr. Richard Hellman, the past president of the American Association of Clinical Endocrinologists, and a clinical professor at the University of Missouri--Kansas City School of Medicine.

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