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Median (filled square) and individual headache scores on a verbal rating scale (VRS) on placebo compared to either pretreatment day with BGC20-1531. The median peak immediate headache score was 2 at T 20 on placebo day, 1.5 at T 30 on BGC20-1531 200 mg day, and 1 at T 20 on BGC20-1531 400 mg day. No difference between AUC headache score on placebo and either BGC20-1531 pretreatment was found (Wilcoxon signed ranks test)
