T43.021 - Poisoning by tetracyclic antidepressants, accidental (unintentional) T43.0 - Poisoning by, adverse effect of and underdosing of tricyclic and tetracyclic antidepressants T43.02 - Poisoning by, adverse effect of and underdosing of tetracyclic antidepressants T43.021 - Poisoning by tetracyclic antidepressants, accidental (unintentional)