Differential effect of Type I and Type II diabetes on antipyrine disposition in man |
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Authors: | T Zysset H Wietholtz |
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Institution: | (1) Department of Clinical Pharmacology, University of Berne, Berne, Switzerland;(2) Department of Internal Medicine, Neues Klinikum, Aachen, Federal Republic of Germany;(3) Regionalspital Biel Hospital Pharmacy, CH-2502 Biel, Switzerland |
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Abstract: | Summary As the influence of diabetes on drug metabolism in patients is controversial, a study was performed to assess antipyrine (AP) disposition in controlled Type I and Type II diabetics and 2 age-and sex-matched control groups. In Type I diabetics, the half-life of AP was significantly reduced from 12.0 (controls) to 7.9 h, and the volume of distribution (V) was lowered from 733 to 569 ml·kg–1. The resulting plasma clearance and cumulative urinary excretion of AP and its metabolites over 24 h did not differ from controls. In Type II diabetics, the AP half-life (14.5 h) and V (568 ml·kg–1) did not differ from their age- and sex-matched controls (11.1 h and 643 ml·kg–1, respectively), but the plasma clearance of AP was significantly reduced by 30%, and urinary excretion was significantly reduced to 44% of controls.The differential effects of Types I and II diabetes on AP metabolism may explain, at least in part, the controversial data in the literature. |
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Keywords: | diabetes mellitus antipyrine drug disposition pharmacokinetics Type I-/Type II diabetics cytochrome P-450 |
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