allergic to any of its ingredients. ingrezza may cause serious side effects, including sleepiness. don't drive, operate heavy machinery, or do other dangerous activities until you know how ingrezza affects you. other serious side effects include potential heart rhythm problems and abnormal movements. shift the focus more on you. ask your doctor about ingrezza. it's simple. one pill, once-daily. #1 prescribed for td. learn how you could pay as little as $0 at ingrezza.com don't you just love the look on the kids' faces... yea, that look of pure terror...