Mithridates VI was so paranoid of being poisoned that he took small doses throughout his life to build up an immunity. When he was finally captured by the Romans, he tried to kill himself with poison but failed because he was immune.
fact
Mithridates VI was so paranoid of being poisoned that he took small doses throughout his life to build up an immunity. When he was finally captured by the Romans, he tried to kill himself with poison but failed because he was immune.