| benzodiazepine → Causes → respiratory depression | 0.44 | |
| opiate → Causes → respiratory depression | 0.40 | |
| morphine → Causes → respiratory depression | 0.35 | |
| codeine → Causes → respiratory depression | 0.25 | |
| abuse → HasSubevent → respiratory depression | 0.16 | |
| heroin → Causes → respiratory depression | 0.16 |