Allergan has entered into a definitive merger agreement to acquire MAP Pharmaceuticals for approximately $958 million. MAP is a biopharmaceutical company focused on developing and commercializing new therapies in neurology, including Levadex, an orally inhaled drug for the potential treatment of migraine, which is currently under FDA review. The acquisition is expected to close in 1Q13.   “One of the key drivers of Allergan’s continued success is our focus on medical specialties where we have ex...