T42.6X4 - Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined T42.6 - Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs T42.6X - Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs T42.6X4 - Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined