Methods	R, DB, AC, cross-over Two attacks treated, each with a single dose of each study medication. Mediaction taken at onset. Rescue medication (usual) after 3 h if necessary
Participants	Migraine (Ad Hoc criteria). Aged 18 to 70 years. Frequency 1 to 6 attacks per month N = 149 (116 used both treatments) M 16, F 100 Mean age 45 years
Interventions	Paracetamol 1000 mg, n = 116 Tolfenamic acid 400 mg, n = 116
Outcomes	Adverse events
Notes	Oxford Quality Score: R1, DB2, W1. Total = 4
Risk of bias
Item	Authors’ judgement	Description
Adequate sequence generation?	Unclear	Not described
Allocation concealment?	Unclear	Not described
Blinding? All outcomes	Yes	“identical sealed packages containing two capsules of each drug”