the antiarrhythmic drugs procainamide ( 1.0 x 10 ( -4 ) m ) , mexiletine ( 1.0 x 10 ( -5 ) m ) and propranolol ( 1.0 x 10 ( -4 ) m ) depressed both oap and triggered activity .
C0003195
antiarrhythmic drugs
C0033216
procainamide