There are 2 thiazolidinediones approved for prescription use in the United States, rosiglitazone maleate (Avandia™) and pioglitazone hydrochloride (Actos®). Both drugs are approved by the United States Food and Drug Administration for use in adults for the treatment of type 2 diabetes, either as monotherapy or in combination with insulin, metformin, or sulfonylurea when diet, exercise, and a single agent does not result in adequate glycemic control. Neither drug is currently approved for use in prediabetes or the metabolic syndrome. The objective of this review was to compare thiazolidinediones in the treatment of type 2 diabetes, prediabetes, and the metabolic syndrome.
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