i highly doubt he took any drugs, he had a rare case which caused the back of his brain, the part for thinking expand like a muscle, they analized a picture of his brain before it was cut into 250 pieces and the images showed that there significant differences on einsteins brain than a normal human brain, the pieces of the brain have been preserved and kept at a secret location, the scientist said by 2020 they will maybe be able to reconstruct a virtual copy of the brain