Clearly, the intense drug regimen that Landy had him on to keep him passive in the '80s and early '90s
permanently altered his brain, almost to the point of a small-scale lobotomy (is there such a thing?)
He saved his life, and he is physically healthy today, but what a terrible cost....At least he's happy, that's the most important thing.
Sorry to bang on, but that is what I don't really know. Was it actually Landy who determined the pharmological elements to Brian's treatment, including the dosages and types of drug? Or was there more of a free-for-all amongst the team of psychiatrists that Landy had around him, including some which were very reputable?
Landy seemed overly controlling and was undoubtably in it for the money, but did he need Brian really dosed up? he controlled everything anyway. Landy could have given Brian placebos and still got him to do what he wanted.
Maybe we'll get solid evidence of all of this. One day.