histamine responsiveness was assessed by calculating the provocation concentration of histamine diphosphate to increase lung resistance ( rl ) to 150 % ( pc 150 % rl ) , or decrease dynamic lung compliance ( cdyn ) to 75 % ( pc 75 % cdyn ) of the response to saline [ rl ( sal ) and cdyn ( sal ) , respectively ] .
C0019588
histamine
C0062740
histamine diphosphate