Al-Qur'an is such medicine or therapy - medicine for body and soul. The good Muslims who do all regulations ruled in Islam - doing sholat, zakat, doing hajj or umrah, having noble heart, always doing good for others, only eat the halal foods/drink, and so on - reading Al-Qur'an will guide them to be the better ones whether physically or mentally. I have experienced on this one. But to the tyrant ones ; they will get nothing. Just read Surah Bani Israil - verse 82 in Al-Qur'anul Kariem.