The Lathe of Heaven

In Portland, Oregon, in the near future, George Orr is charged with misuse of multiple prescription medications, which he was taking to keep himself from dreaming; he volunteers for psychiatric care to avoid prosecution, and is assigned to the care of licensed oneirology William Haber. Orr's explanation of his drug abuse is incredible: he has known since age 17 that his dreams change reality, and tries to prevent himself from dreaming because he fears their effects.