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  • Title: [Methods for studying the hepatic metabolism of drugs in man].
    Author: Geneve J, Bergmann JF, Caulin C, Segrestaa JM.
    Journal: Therapie; 1990; 45(2):91-7. PubMed ID: 2191470.
    Abstract:
    Various methods can be used to investigate human hepatic drug metabolism in vivo. a) Indirect methods based on the assessment of atoxic substances metabolism in order to investigate: --hepatic oxidative activity by antipyrine or caffeine clearance and aminopyrine breath test determination. Such an activity can be modified by drug-induced enzyme induction or inhibition and in case of hepatic disease; --genetic polymorphism of hepatic drug metabolism assessed by the determination of debrisoquine or dextrometorphane metabolic ratio and of N-acetylation phénotype. Unusual therapeutic or adverse effects could be explained by such a polymorphism; --hepatic blood flow, which variations could modify hepatic clearance of drugs with a high hepatic extraction ratio, by the assessment of indocyanine green clearance. b) Direct methods based on pharmacokinetics data and their alterations under various circumstances: simultaneous administration of other drugs, liver disease.
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