Comparison 1. Nifedipine vs placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1.1 Pain relief (any)	2	66	Odds Ratio (M‐H, Fixed, 95% CI)	9.04 [2.61, 31.31]
1.2 Good or excellent pain relief	2	66	Odds Ratio (M‐H, Fixed, 95% CI)	43.78 [5.34, 359.01]
1.3 Total side effects	1	24	Odds Ratio (M‐H, Fixed, 95% CI)	0.94 [0.08, 10.90]
1.4 Bothersome side effects	1	24	Odds Ratio (M‐H, Fixed, 95% CI)	0.54 [0.07, 4.20]
1.5 Requirement for additional medication	1	42	Odds Ratio (M‐H, Fixed, 95% CI)	13.60 [3.09, 59.83]