new antiarrhythmic drugs are chiefly assigned to class 1c and 1b : `` '' procainamide analogues '' '' ( acecainide , lorcainide , flecainide , encainide ) and propafenone for the former , and mexiletine , tocainide and aprindine for the latter .
C0003195
antiarrhythmic drugs
C0016229
, flecaini