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Related Experiment Videos

Nifedipine in exercise-induced asthma.

J M Marín, E León, A Pérez-Trullén

    Allergologia Et Immunopathologia
    |January 1, 1986
    PubMed
    Summary
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    Calcium channel blockers do not effectively treat exercise-induced asthma (EIA) once symptoms begin. Metaproterenol inhalation was required to alleviate dyspnea in patients experiencing EIA.

    Area of Science:

    • Pulmonology
    • Pharmacology

    Background:

    • Exercise-induced asthma (EIA) is a common condition.
    • Calcium entry blockers are sometimes considered for EIA management.
    • Their efficacy in treating established EIA symptoms is not well-documented.

    Purpose of the Study:

    • To investigate the effectiveness of calcium entry blockers in treating established exercise-induced asthma.
    • To assess the bronchodilatory effects of calcium entry blockers post-exercise challenge.

    Main Methods:

    • Nine patients with diagnosed EIA underwent a 10-minute exercise test.
    • Pulmonary function tests (FVC, PEF, MEF25, sGaw) were measured before and after exercise.
    • Patients received a 20 mg dose of a calcium entry blocker.
    • Response to metaproterenol inhalation was also assessed.

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    Main Results:

    • Exercise challenge led to a ≥20% decline in all measured pulmonary function parameters.
    • The administered calcium entry blocker did not alter these parameters.
    • Metaproterenol inhalation (400 mcg) reversed dyspnea in all patients.

    Conclusions:

    • Calcium entry blockers are ineffective in reversing bronchoconstriction once exercise-induced asthma is established.
    • Bronchodilation in EIA requires specific bronchodilator medications like metaproterenol.