Table 2.
Distribution of the most common adverse drug reactions (ADRs) observed in first-time and repeat hospital episodes in people aged ≥60 years, WA 1980–2003
| First-time episodes (N = 37 296) | Repeat episodes (N = 10 212) | ||||
|---|---|---|---|---|---|
| ICD code | ADR diagnosis | n | % | n | % |
| 787.0–787.03/R11 | Nausea and/or vomiting | 2819 | 7.6 | 816 | 8.0 |
| 286.5/D68.3 | Haemorrhagic disorder due to circulating anticoagulants | 1474 | 4.0 | 557 | 5.5 |
| 733.09/M81.4 | Drug-induce osteoporosis | 280 | 0.8 | 495 | 4.8 |
| 972.0–972.9/T46.0-T46.9 | Poisoning by agents of cardiovascular system | 1828 | 4.9 | 397 | 3.9 |
| 693.0/L27.0–L27.1 | Dermatitis due to drugs | 1727 | 4.6 | 355 | 3.5 |
| 288.0/D70 | Drug-induce agranulocytosis | 935 | 2.5 | 331 | 3.2 |
| I95.2 | Hypotension due to drugs | 1054 | 2.8 | 300 | 2.9 |
| 284.8/D61.1 | Drug-induce aplastic anaemia | 301 | 0.8 | 196 | 1.9 |
| 558.2/K52.1 | Unspecified adverse effect of drug or medicament | 390 | 1.0 | 151 | 1.5 |
| 966.0–968.9/T42.0–T42.8 | Poisoning by anticonvulsants and anti-Parkinsonism | 504 | 1.4 | 113 | 1.1 |
| Total | 11 312 | 30.3 | 3711 | 36.3 | |