Table 2.

Adverse effects of cannabinoids to assess or monitor

ADVERSE EFFECTCANNABINOID EVENT RATE, %PLACEBO EVENT RATE, %NUMBER NEEDED TO HARM
Overall adverse effects81626
Withdrawal due to adverse effects11Approximately 314
“Feeling high”3534
Sedation50305
Dizziness32115
Speech disorders3275
Ataxia or muscle twitching30116
Hypotension25118
  • Data from Allan et al.9