Karl,
I am in contact with a professor in the UK who is an expert on the BBB and heads a group doing research into the BBB. She is very interested in the concept, and is starting work shortly on this topic. So the cavalry is coming in the form of professional help.
wwallyo,
I have not investigated neuroleptic drugs, not quite sure what you are suggesting. As far as I know , neuroleptic drugs can be tranquilisers, so do they fight stress by reducing permeability of the BBB. Try your search adding "permeability" to your search words.
Ron