Kuritzky 1987

Methods	D: crossover C: unclear B: unclear WD: 7/38 J: 1‐0‐0 DU: ‐/2x8w (unclear whether washout)/‐
Participants	N: 38/31 D: 7 migraine with, 24 without aura C: unclear F: unclear A: 17‐53 years DU: mean 14 years S: unclear, Israel
Interventions	P: 160 mg (long‐acting) C: Placebo
Outcomes	R: not reported F: 3.23 vs. 5.56 attacks (p = 0.014; no variance data presented) AU: not reported HI: not reported AEs: not reported Dropouts‐AEs: not reported V: +
Notes	Available only as an abstract
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	B ‐ Unclear