while all of the drugs work on cgrp, they don�t all work the same way. three of them target the cgrp molecule itself. aimovig goes after cgrp's receptor in the brain..may 18, 2018.: "arise: a phase 3 randomized trial of erenumab for episodic migraine.". and prevention says hepatitis a is a vaccine-preventable, communicable disease of the liver caused by a virus. it is usually transmitted person-to-person or by consuming. august 2017 (21)