I am so sorry no one responded you must have slipped through, keep in touch with the Doctors I hear there are new Meds coming out all the time, you may want to google 'Remba" I have heard good and hopeful reports about this, it is on trials at the presant time 3rd year coming up, and will be on the Market if passed by the FAA within 2 years after . You could try keeping him occupied with some word games if he can do them, ,make sure he is upbeat with plenty of company, read to him, music, Good luck