these effects were abolished after i.c.v . beta-adrenoceptor blocking drugs but were unaffected by alpha-adrenoceptor blocking agents.3 in 5 out of 20 cats , i.c.v . isoprenaline regularly produced dose-related falls in blood pressure with associated tachycardias ;
C0022245
isoprenaline
C0039231
tachycardias