A randomized double-blind study was performed to examine the effect of clofibrate on glucose tolerance in subjects with non-insulin-dependent diabetes mellitus (NIDDM). Clofibrate (1.5 g/day) or placebo was administered to 70 patients and an oral glucose tolerance test (OGTT) was performed before and 12 wk after treatment. Blood glucose levels were significantly improved in clofibrate-treated groups at all time points during OGTT, whereas there was no change in insulin levels. Improvement of fasting glucose levels required 8 wk of clofibrate treatment. Insulin binding to erythrocytes demonstrated no significant change in the clofibrate-treated subjects.A randomized double-blind study was performed to examine the effect of clofibrate on glucose tolerance in subjects with non-insulin-dependent diabetes mellitus (NIDDM). Clofibrate (1.5 g/day) or placebo was administered to 70 patients and an oral glucose tolerance test (OGTT) was performed before and 12 wk after treatment. Blood glucose levels were significantly improved in clofibrate-treated groups at all time points during OGTT, whereas there was no change in insulin levels. Improvement of fasting glucose levels required 8 wk of clofibrate treatment. Insulin binding to erythrocytes demonstrated no significant change in the clofibrate-treated subjects. These results suggest that clofibrate improves glucose tolerance in NIDDM subjects without a change in insulin receptors and that clofibrate increases insulin sensitivity through an unknown postreceptor mechanism.
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Kobayashi et al. (1988) studied this question.