theophylline was significantly less effective in antagonizing the bronchospasm elicited by maximally effective dose ( 100 micrograms/kg i.v . ) of acetylcholine as well as by a dose equieffective to capsaicin 10 micrograms/kg ( i.e . acetylcholine 50 micrograms/kg ) .
C0039771
theophylline
C0006266
bronchospasm