Immediate CGRP-induced headache

Diagnostic criteria:
A. Any headache fulfilling criterion C
B. Calcitonin gene-related peptide (CGRP) has been administered
C. Evidence of causation demonstrated by all of the following:

    1. headache has developed within 1 hr of CGRP absorption
    2. headache has resolved within 1 hr after absorption of CGRP has ceased
    3. headache has at least one of the following four characteristics:

      a) bilateral
      b) mild to moderate intensity
      c) pulsating quality
      d) aggravated by physical activity

D. Not better accounted for by another ICHD-3 diagnosis.