Does LSD Cause Brain Damage? - LSD Addiction It says it doesn't. So how on earth is Syb Barrett some kind of phenominal exception?? Gilmore said that Syd's story is romanticized. I imagine British Secret Service saw Syd as a dangerous entity and clandestinly gave him a lobotomy, a practice which started to wane at the time. There is no other likely explaination for his rapid mental disturbances. Or maybe he fell on his head, while tripping? no pun intended.