.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. . .it causes stroke and dementia as well as mood disturbance. svd increases with age but is accelerated by hypertension and diabetes. .daily pilot . . of migraine. more than 4 million of them have at least 15 migraine days each month. even though many drugs prevent and treat these headaches, .