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Propylthiouracil-induced diffuse interstitial pneumonitis.

K Miyazono, T Okazaki, S Uchida

    Archives of Internal Medicine
    |September 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    Propylthiouracil, used for Graves' disease, can cause diffuse interstitial pneumonitis. This lung condition, characterized by cough and dyspnea, improved after stopping the drug and using steroids.

    Area of Science:

    • Pulmonology
    • Endocrinology
    • Pharmacology

    Background:

    • Graves' disease is an autoimmune disorder leading to hyperthyroidism.
    • Propylthiouracil is a common antithyroid medication used to manage Graves' disease.
    • Drug-induced lung injury is a known but uncommon adverse effect of various medications.

    Observation:

    • Two patients with Graves' disease developed respiratory symptoms including productive cough, exertional dyspnea, and hypoxemia.
    • These symptoms emerged after treatment with propylthiouracil (300 mg/day) for varying durations (three weeks to six months).

    Findings:

    • Chest imaging and lung biopsies confirmed diffuse interstitial pneumonitis in both patients.
    • In vitro tests showed propylthiouracil highly stimulated lymphocyte transformation.

    Related Experiment Videos

  • Discontinuation of propylthiouracil and initiation of prednisolone acetate led to symptom resolution.

    • Implications:

    • This study highlights propylthiouracil-induced diffuse interstitial pneumonitis as a potential adverse effect.
    • Clinicians should consider drug-induced lung disease in patients on propylthiouracil presenting with respiratory symptoms.
    • Early recognition and drug withdrawal are crucial for managing this rare complication.