In the 60s, mental health medication available was the Hal doll Thorazine for which we're our heavy duty antipsychotic drugs and ECT. Even PTSD would have been remotely considered for him yet because it was still called shell shock pretty much. The things that Sam is dealing with are not things that can be medicated away. You can't medicate trauma and somewhat medicate the ramifications of it. People often say, I don't want to become a zombie like those people that I see are on those meds and go like guys with depression, you're not no one's giving it Thorazine.