p-11 ( 0.25 to 1.00 mg/kg i.v . ) decreased the positive chronotropic effects of isoprenaline ( 0.2 micrograms/kg i.v . ) , but potentiated the isoprenaline-induced hypotension in reserpine-pretreated rats .
C1372804
positive chronotropic
C0022245
isoprenaline