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Do sympathomimetic amines prevent exercise-induced asthma by bronchodilatation alone?
British Journal of Diseases of the Chest
|April 1, 1977
Summary
Beta-adrenergic agonists may offer protection against exercise-induced asthma beyond bronchodilation. Further research is needed to determine if these effects are anti-allergic.
Area of Science:
- Pulmonology
- Pharmacology
Background:
- Exercise-induced asthma (EIA) is a common condition affecting athletes and the general population.
- Beta-adrenergic agonists are frequently used for asthma management due to their bronchodilator effects.
Purpose of the Study:
- To investigate potential non-bronchodilator protective effects of beta-adrenergic agonists against EIA.
- To compare the efficacy of isoetharine and sodium cromoglycate in preventing EIA.
Main Methods:
- Eleven patients with EIA received isoetharine or isoprenaline, with EIA testing after bronchodilation subsided.
- Three patients demonstrated repeatable protection not attributable to chance.
- Ten patients were treated with isoetharine or sodium cromoglycate, with EIA prevention assessed.
Main Results:
- Protection against EIA was observed in three patients after beta-adrenergic agonist administration, independent of bronchodilation.
- This protective effect was repeatable in subsequent trials.
- No significant difference was found between isoetharine and sodium cromoglycate in preventing EIA, and isoetharine's protection was not linked to its bronchodilator potency.
Conclusions:
- Beta-adrenergic agonists may possess additional mechanisms beyond bronchodilation that protect against exercise-induced asthma.
- The potential anti-allergic nature of these additional actions remains to be elucidated.