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Related Experiment Videos

Quinidine induced sicca syndrome.

J E Naschitz, D Yeshurun

    Journal of Toxicology. Clinical Toxicology
    |June 1, 1983
    PubMed
    Summary

    A 67-year-old patient developed sicca syndrome, a rare hypersensitivity reaction, after taking quinidine sulphate. Symptoms resolved upon drug discontinuation and reappeared with re-challenge, confirming the link.

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    Area of Science:

    • Pharmacology
    • Immunology
    • Ophthalmology

    Background:

    • Quinidine sulphate is an antiarrhythmic medication.
    • Sicca syndrome is characterized by dry eyes and mouth.
    • Hypersensitivity reactions to medications can manifest in various ways.

    Observation:

    • A 67-year-old patient presented with clinical and laboratory signs of sicca syndrome.
    • These symptoms emerged two weeks after starting quinidine sulphate therapy at 1.2 gm/day.
    • The patient's condition improved upon cessation of quinidine sulphate.

    Findings:

    • The sicca syndrome symptoms recurred when the patient was re-exposed to quinidine sulphate.
    • This case suggests a hypersensitivity reaction to quinidine as the cause of sicca syndrome.
    • This represents a previously undescribed adverse effect of quinidine.

    Implications:

    • Clinicians should consider quinidine as a potential cause of sicca syndrome in patients.
    • This finding expands the known spectrum of quinidine-induced hypersensitivity reactions.
    • Further investigation into the immunological mechanisms of quinidine hypersensitivity is warranted.

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