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Calcitonin gene-related peptide (CGRP) is a neuronal transmitter present in intracranial sensory nerves, where it is involved in migraine pathophysiology as well as other biological functions. Recently, the fully human monoclonal antibody erenumab (AMG 334), which targets the canonical calcitonin gene-related peptide receptor, showed significant prophylactic efficacy and favourable safety in phase II and III clinical trials for episodic and chronic migraine and is now approved for migraine prevention in several countries.