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Obstet Gynecol. 1975 Feb;45(2):159-62.

Effects of diuril and dilantin on blood glucose and insulin levels in late pregnancy.


In order to evaluate the carbohydrate metabolic effects of certain drug therapies used in treating the toxemia syndrome, 75 term pregnant women were studied with two intravenous glucose tolerance tests performed 1 week apart. During the 2-hour tests, both blood glucose and plasma insulin were measured. The women were randomly assigned to three treatment groups, and during the week between tests they received:a) no drugs (control or C group);b) Diuril, 500 mg/day (Dgroup); or c)Dilantin, 100 mg, t.i.d. (DL group). Each group was of similar age, weight, and gestational age. There were no significant changes in any of the glucose curves. Both drug-treated groups demonstrated insulin changes. In contrast to the C group, the D group showed an elevation of the plasma insulin values during the second test, and the DL group had a lowering of plasma insulin levels in the second test. Thus, both drugs had minor effects on carbohydrate metabolism during short-term use. However, a more marked metabolic effect of these drugs must be considered when using them at higher dosages or for a longer duration.

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