The second oral CGRP antagonist to win FDA approval for acute migraine care is now the first to add preventive treatment to its label, marking a valuable win for Biohaven Pharmaceutical Holding Co. Ltd. and its oral dissolving tablet, Nurtec (rimegepant). The U.S. approval, for preventive treatment of episodic migraine, officially blesses a use for the medicine already adopted by many doctors, Piper Sandler analyst Christopher Raymond wrote, while opening up a potentially rich new stream of revenue for Biohaven.