Medication categories within DU90% in 2013 and 2017
| 2013 | 2017 | |
| BNF chapters | n (%) of prescriptions | |
| Gastrointestinal | 93 358 (9.4) | 89 182 (9.6) |
| Cardiovascular | 245 279 (24.7) | 228 782 (24.6) |
| Respiratory | 84 843 (8.5) | 81 301 (8.8) |
| Central nervous system | 262 184 (26.4) | 241 016 (25.9) |
| Infections | 80 851 (8.1) | 67 143 (7.2) |
| Endocrine | 81 299 (8.2) | 83 688 (9.0) |
| Obgyn, urinary tract disorders | 54 706 (5.5) | 53 129 (5.7) |
| Malignancy and immunosuppression | 4563 (0.5) | 4857 (0.5) |
| Nutrition and blood | 25 785 (2.6) | 26 274 (2.8) |
| Musculoskeletal | 58 485 (5.9) | 50 283 (5.4) |
| Anaesthesia | 3191 (0.3) | 3169 (0.3) |
| Drug classes | Mean (SD) agents in DU90% per practice | |
| Statins | 3.42 (0.65) | 3.50 (0.65) |
| PPIs | 2.74 (0.74) | 2.94 (0.75) |
| ACE inhibitors | 3.60 (0.65) | 3.38 (0.66) |
| ARBs | 3.13 (0.96) | 2.74 (0.73) |
| CCB | 3.02 (0.86) | 2.98 (0.88) |
| BB | 3.65 (0.80) | 3.41 (0.66) |
| SSRIs | 3.96 (0.71) | 3.84 (0.71) |
| Penicillins | 2.90 (0.32) | 2.90 (0.38) |
| Opioids | 4.81 (1.47) | 5.00 (1.40) |
ARBs, angiotensin II receptor blockers; BB, beta blocker; BNF, British National Formulary; CCB, calcium channel blocker; DU90%, drug utilisation 90%; PPIs, proton-pump inhibitors; SSRIs, selective serotonin reuptake inhibitors.