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Comparison of bronchial reactivity to histamine and methacholine in asthmatics
Author(s) -
SALOME C. M.,
SCHOEFFEL R. E.,
WOOLCOCK A. J.
Publication year - 1980
Publication title -
clinical and experimental allergy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.462
H-Index - 154
eISSN - 1365-2222
pISSN - 0954-7894
DOI - 10.1111/j.1365-2222.1980.tb02135.x
Subject(s) - methacholine , histamine , asthma , medicine , dose , immunology , anesthesia , respiratory disease , lung
Summary Eight subjects with asthma underwent bronchial challenge with histamine and methacholine. Dose‐response curves were drawn on a scale which made the dosages equivalent in molecular weight. The results were analysed in terms of both the slope of the dose‐response curve and the dose required to elicit a 20% fall in FEV1. No significant difference between methacholine and histamine was found in either measurement. Because of the similarity of the responses we conclude that the two agents are similar in action and may be used with equal effectiveness in bronchial challenges.