Another example Dr. B gave is that Gregory seems to demonstrate a certain level of anxiety, fear, and discomfort if only because he is not able to analyze an experience using language. "That poor guy does not know whether he can trust an experience or if he needs to fear it." You have heard of the very basic "Fight or Flight" instinct.
With the careful, loving use of drugs, I am content in knowing that Gregory does not have to worry about analyzing an experience for fear or trust. Also, he is better able to communicate, using the basic, primitive abilities he has left, to let me (us) know when he is happy, content, sad, or frustrated. And because his responsive behaviors are more under control, we can adjust ourselves to them and make his day to day life as good as possible for him.