135. ANTAGONISTS AND POTENTIATORS OF DRUGS ACTING ON THE BRONCHI 



Inclusion of trade names is for informative purposes only and in no way implies endorsement by The National 

 Academy of Sciences-The National Research Council. For all "effects" included in this table, there is reasonable 

 evidence the drug in fact acted on the bronchial musculature. Where there was evidence that an effect was mediated 

 by the respiratory center or adrenal glands, it was excluded. Similarly, results obtained in protecting guinea pigs 

 against lethal doses of histamine were excluded, unless there was evidence of the relief of bronchospasm. Drug 

 actions influencing only anaphylactic or asthmatic bronchospasm, or other pathological states of the bronchi, were 

 also excluded. Concentrations of drugs are given in jjg/ml for local action on isolated preparations, and doses in 

 mg/kg for drugs administered systemically. Parentheses in Columns F and H indicate action is slight, irregular, 

 or doubtful, and the original literature should be consulted. C = constricts, D = dilates, A = antagonizes active 

 drug effect, 1 = inactive (i.e., without influence on effect of active drug), P = potentiates active drug effect. 



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