Disclosed herein are methods of treating or reducing incidence of a cluster headache, e.g., chronic cluster headache and episodic cluster headache, and/or at least one secondary symptom associated with a cluster headache in a subject comprising administering to the subject a monoclonal antibody that modulates the CGRP pathway. Compositions for use in the disclosed methods are also provided. Antagonist antibody G1 and antibodies derived from G1 directed to CGRP are also described.
