| ICD Code | Description |
|---|---|
| T420 | Poisoning by, adverse effect of and underdosing of hydantoin derivatives |
| T421 | Poisoning by, adverse effect of and underdosing of iminostilbenes |
| T422 | Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones |
| T423 | Poisoning by, adverse effect of and underdosing of barbiturates |
| T424 | Poisoning by, adverse effect of and underdosing of benzodiazepines |
| T425 | Poisoning by, adverse effect of and underdosing of mixed antiepileptics |
| T426 | Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs |
| T427 | Poisoning by, adverse effect of and underdosing of unspecified antiepileptic and sedative-hypnotic drugs |
| T428 | Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants |