ADVERSE EFFECT | CANNABINOID EVENT RATE, % | PLACEBO EVENT RATE, % | NUMBER NEEDED TO HARM |
---|---|---|---|
Overall adverse effects | 81 | 62 | 6 |
Withdrawal due to adverse effects | 11 | Approximately 3 | 14 |
“Feeling high” | 35 | 3 | 4 |
Sedation | 50 | 30 | 5 |
Dizziness | 32 | 11 | 5 |
Speech disorders | 32 | 7 | 5 |
Ataxia or muscle twitching | 30 | 11 | 6 |
Hypotension | 25 | 11 | 8 |
Data from Allan et al.9