| Outcomes(follow up; weeks) | Probable outcome with active | Probable outcome with placebo | RR, RD, NNT, NNH, NNTp(95% CI) | No of Participants (studies) | Certainty of the evidence (GRADE) | Comments |
| Pain relief of 50% or more | ||||||
| PGIC very much improved | ||||||
| Serious adverse events | ||||||
| Withdrawals due to adverse events | ||||||
| Pain relief of 30% or more | ||||||
| PGIC much or very much improved | ||||||
| Withdrawal due to lack of efficacy |
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