Figure 2.

Mean VAS headache intensity over the first 2 h after drug administration. Significant improvements with diclofenac potassium for oral solution versus placebo were observed starting at 15 minutes. VAS from 0–100, with 0 = no headache to 100 = excruciating headache requiring bedrest. *p ⩽ 0.05 for diclofenac potassium for oral solution versus placebo; †p ⩽ 0.05 for diclofenac potassium for oral solution versus diclofenac potassium tablet; ‡p ⩽ 0.05 for diclofenac potassium tablet versus placebo. Figure reproduced with permission from Diener and colleagues.³¹

VAS, visual analog scale.