" Islam emphasizes reason; it is the basis upon which humans are held accountable for their choices. It is also the characteristic that elevates the human being above the rest of Allah's creation, if that gift is used appropriately.
Islamic law is designed in such a way as to preserve reason and intellect and to ensure its well-being and freedom. Islam prohibits the use of any substance that may affect the mind negatively or decrease its ability in any way. "

― , Psychology from the Islamic Perspective