low doses of verapamil ( 0.2 mg/kg i.v . + 0.3 mg x kg-1 x h-1 ) , and of disopyramide ( 10 mg/kg ) had few antiarrhythmic , or other actions , whereas high doses of verapamil ( 20 mg/kg ) and disopyramide ( 40 mg/kg i.v . repeated ) were markedly antiarrhythmic as measured by all indices .
C0012702
disopyramide
C0003195
antiarrhythmic