. october 2005 (12).: "targeted cgrp small molecule antagonists for acute migraine therapy.".in a news release, the drug's manufacturer, amgen, said the list price will be 5 a month or ,900 annually. costs to patients may vary depending on insurance..so robert, too, was admitted on april 28 to st. jude, but to the cardiac unit � which is in a separate building from that of cancer patients.