...his condition in Roanoke is a strong testament that lassitude, indifference...

...his condition in Roanoke is a strong testament that lassitude, indifference and the peculiarities of his thought were primarily the consequences of his illness and not of the early attempts to treat it. The popular view that anti-psychotics were chemical straight jackets that suppressed clear thinking and voluntary activity seems not to be borne out in Nash's case.
If anything, the only periods when he was relatively free of hallucinations, delusions and the erosion of will were the periods following either insulin treatment or the use of anti psychotics. In other words, rather than reducing Nash to a zombie, medication seemed to reduce zombie like behavior.