Table 5: Rates of adverse effects & intervention.
| Most common adverse effect | ||||||||
| Dizziness | Discomfort | Fatigue | Change in vision | |||||
| Time | Ketamine | Morphine | Ketamine | Morphine | Ketamine | Morphine | Ketamine | Morphine |
| 15 min | 1 | 1 | 1 | 0 | 2 | 1 | 1 | 1 |
| 30 min | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 |
| 60 min | 0 | 2 | 0 | 1 | 0 | 1 | 0 | 0 |
| 90 min | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| 120 min | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |