plasma digoxin concentration ( pdc ) rose during the cotreatments in the sequence : gallopamil ( +16 % ) less than propafenone ( +37 % ) less than nifedipine ( +45 % ) less than verapamil ( almost independent of dose , +69 % ) less than quinidine ( +118 % ) .
C0016986
gallopamil
C0042523
verapamil