The new Robocop was enjoyable. One of the things they did to him, right before he was going to be shown to the public, was turn his dopamine down to zero, basically to zombify him.
I experienced the same thing, after my psychotic break they put me on antipsychotics that killed my dopamine reactions. At first I was on so much medication that eventually my inner monologue ground to a halt. I know this because like a lot of people I would think about things in the shower (wasting water in the process). But this particular shower I had nothing I wanted to think about so just cleaned myself and quit.