Best drug therapy for paranoid schizophrenia in a thin built 21 - years old young male would be
High-Yield Explanation
The clue in this question is antipsychotic that can be used in lean patients, antipsychotic olanzapine is a well researched drug that has lesser discontinuation * Ref.Kaplon and sadock, synopsis of psychiatry, 11 th edition, pg no. 1053