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Related Experiment Videos

Simple method for determining isoniazid acetylator phenotype.

D W Russell

    British Medical Journal
    |August 8, 1970
    PubMed
    Summary
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    New methods allow acetylisoniazid and isoniazid urine estimation without a spectrophotometer. The ratio of these isoniazid metabolites in urine showed a bimodal distribution in volunteers after oral dosing.

    Area of Science:

    • Pharmacokinetics
    • Analytical Chemistry
    • Clinical Chemistry

    Background:

    • Isoniazid is a primary drug for tuberculosis treatment.
    • Acetylisoniazid and isoniazid are key metabolites.
    • Accurate quantification of these metabolites is crucial for therapeutic drug monitoring.

    Purpose of the Study:

    • To develop and validate methods for quantifying acetylisoniazid and isoniazid in urine.
    • To assess the ratio of acetylisoniazid to isoniazid in urine samples.
    • To investigate the pharmacokinetic profile of isoniazid metabolites.

    Main Methods:

    • Development of spectrophotometer-free analytical methods for metabolite estimation.
    • Urine sample collection from volunteers receiving oral isoniazid doses.

    Related Experiment Videos

  • Analysis of acetylisoniazid and isoniazid concentrations in collected samples.

    • Main Results:

    • Successful estimation of acetylisoniazid and isoniazid without spectrophotometry.
    • The ratio of acetylisoniazid to isoniazid in urine samples exhibited a bimodal distribution.
    • Volunteer data revealed variability in metabolite ratios post-isoniazid administration.

    Conclusions:

    • The developed methods offer a practical approach for isoniazid metabolite analysis.
    • The observed bimodal distribution suggests distinct metabolic pathways or acetylation phenotypes in individuals.
    • Further research is warranted to explore the clinical implications of this metabolic variability.