Prespecified drug classes and corresponding BNF chapter and section.
| BNF chapter and section | Drug class |
| 2.2 | Diuretics |
| 2.5 | Hypertension and heart failure |
| 2.12 | Lipid-regulating drugs |
| 3.1 | Bronchodilators |
| 3.2 | Corticosteroids (respiratory) |
| 4.1 | Hypnotics and anxiolytics |
| 4.2 | Drugs used in psychoses and related disorders |
| 4.3 | Antidepressant drugs |
| 4.10 | Drugs used in substance dependence |
| 5.1 | Antibacterial drugs |
| 6.1 | Drugs used in diabetes |
| 7.3 | Contraceptives |
BNF, British National Formulary.