| Code | Description | TFR Code | TFR Description | NCA Code | NCA Description |
|---|---|---|---|---|---|
| DLA | Drugs Acting On Ear | 302 | Drugs (including gases) | 7000 | Drugs |
| DLB | Drugs Acting On Nose | 302 | Drugs (including gases) | 7000 | Drugs |
| DLC | Drugs Acting On Oropharynx | 302 | Drugs (including gases) | 7000 | Drugs |