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Related Experiment Videos

Hyperuricaemia induced by ethambutol.

R K Narang, M C Agarwal, A K Raina

    British Journal of Diseases of the Chest
    |October 1, 1983
    PubMed
    Summary

    Ethambutol treatment for tuberculosis significantly increases serum uric acid levels, independent of dosage. This ethambutol-induced hyperuricemia was reversible with probenicid, indicating a potential management strategy.

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    Area of Science:

    • Pharmacology
    • Clinical Medicine
    • Biochemistry

    Background:

    • Tuberculosis remains a significant global health challenge requiring effective pharmacotherapy.
    • Ethambutol is a key first-line drug for treating pulmonary tuberculosis.
    • Understanding drug-induced metabolic changes is crucial for patient management.

    Purpose of the Study:

    • To investigate the effect of ethambutol on serum uric acid levels in tuberculosis patients.
    • To determine if ethambutol causes hyperuricemia and to explore factors influencing this effect.

    Main Methods:

    • A study involving 70 pulmonary tuberculosis patients and 12 healthy controls.
    • Monitoring serum uric acid levels weekly during ethambutol treatment.
    • Assessing the impact of ethambutol dosage and co-administration of streptomycin.
    • Evaluating the effect of probenicid and salicylates on ethambutol-induced hyperuricemia.

    Main Results:

    • A statistically significant increase in mean serum uric acid levels was observed in ethambutol-treated patients by the second week of treatment.
    • The observed hyperuricemia was independent of ethambutol dosage.
    • 42% of ethambutol-treated patients did not exhibit an increase in uric acid levels.
    • Streptomycin did not potentiate ethambutol's hyperuricemic effect.
    • Hyperuricemia was reversed by probenicid but not by salicylates.
    • No cases of acute gouty arthritis were reported, though two patients experienced arthralgia.

    Conclusions:

    • Ethambutol therapy can lead to a significant increase in serum uric acid levels in tuberculosis patients.
    • The hyperuricemic effect of ethambutol is not dose-dependent and occurs in a subset of patients.
    • Probenicid shows potential in reversing ethambutol-induced hyperuricemia, suggesting a possible therapeutic intervention.
    • While ethambutol can cause arthralgia, it does not appear to precipitate acute gouty arthritis in this cohort.

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