Amgen's Aimovig halved migraine days in 30 percent of trial patients

A late-stage trial of Amgen Inc's experimental drug Aimovig found that it reduced episodic migraines by at least half in 30 percent of patients who had failed up to four previous treatments, while 14 percent of placebo patients achieved that goal, the company said on Tuesday. The 12-week trial, presented this week at the annual meeting of the American Academy of Neurology, involved 246 patients suffering four to 14 migraine headaches a month who had tried two to four preventive treatments that either did not work for them or had intolerable side effects.