Headache developing within 24 hours after regular consumption of caffeine in excess of 200 mg/day for more than two weeks, which has been interrupted. It resolves spontaneously within seven days in the absence of further consumption.
A. Headache fulfilling criterion C
B. Caffeine consumption of >200 mg/day for >2 weeks, which has been interrupted or delayed
C. Evidence of causation demonstrated by both of the following:
1. headache has developed within 24 hr after last caffeine intake
2. either or both of the following:
a) headache is relieved within 1 hr by intake of caffeine 100 mg
b) headache has resolved within 7 days after total caffeine withdrawal
D. Not better accounted for by another ICHD-3 diagnosis.