Abstract
Calcitonin gene-related peptide (CGRP) is a signaling neuropeptide released from activated trigeminal sensory afferents in headache and facial pain disorders. There are a handful of CGRP-targeted therapies currently in phase 3 studies for migraine acute treatment or prevention. Currently, 4 monoclonal antibodies targeting either the CGRP ligand or receptor are being studied for migraine prevention: ALD403 (eptinezumab), AMG 334 (erenumab), LY2951742 (galcanezumab), and TEV-48125 (fremanezumab). Meanwhile, 1 small-molecule CGRP receptor antagonist (ubrogepant, MK-1602) is currently in phase 3 studies for the acute treatment of migraine. Two of these anti-CGRP monoclonal antibodies are in clinical trials for cluster headache prevention as well. Several other small-molecular CGRP receptor antagonists are in earlier stages of development for acute migraine treatment or prevention. In this review, we will discuss the growing body of clinical trials studying CGRP-targeted therapies for migraine and cluster headache.
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