Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Adverse effects
[23] RCT 4-armed trial	93 people (diagnosed with IHS criteria[17]) In review [10]	Proportion of people reporting one or more adverse effect 11/24 (46%) with ibuprofen 10/23 (43%) with placebo	Significance not assessed