Calcitonin gene-related peptide receptor antagonists for the treatment of migraine: a patent review

Background: Migraine is a debilitating headache disorder which affects ∼ 12% of the general population and is the cause of significant loss of productivity (i.e., lost time from work or school) for those afflicted. The current standard of care, the 5-HT1B/1D agonists known as triptans, is contraindicated in patients with cardiovascular disease due to their inherent vasoconstrictive activity; thus, there is a need to develop an alternative therapy for the treatment of the disorder. Objective: This article reviews patent publications related to the use of small molecule calcitonin gene-related peptide (CGRP) receptor antagonists for the treatment of migraine that have appeared in the literature within the past decade. The commentary is supplemented by information presented in journal articles and focuses on the activity of several major pharmaceutical companies in the field. Conclusion: Two small molecule CGRP receptor antagonists, olcegepant and telcagepant, have been shown to be clinically efficacious in ...