T46.2X6 - Underdosing of other antidysrhythmic drugs T46.2 - Poisoning by, adverse effect of and underdosing of other antidysrhythmic drugs, not elsewhere classified T46.2X - Poisoning by, adverse effect of and underdosing of other antidysrhythmic drugs T46.2X6 - Underdosing of other antidysrhythmic drugs