Comparison 1. Anticonvulsants and opioids versus anticonvulsants alone.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1.1 At least moderate/good pain relief	2	423	Risk Ratio (M‐H, Fixed, 95% CI)	1.30 [1.04, 1.61]
1.2 Proportion of patients who dropped out due to side effects	2	433	Risk Ratio (M‐H, Fixed, 95% CI)	2.76 [1.47, 5.21]