A person with Acquired Situational Narcissism develops symptoms (including anxiety and substance abuse) when, for instance, he is promoted to CEO unexpectedly and finds his colleagues becoming sycophantic. The situational part comes when he gets used to walking into a room and watching the staff turn and stare. He can't imagine there was ever any other way for people to behave. ASN describes celebrities and billionaires, but it easily applies to the upstart who just became your boss. The sufferer enjoys his condition but it's not long before those who made him into a monster turn on him.
This is when he hits the bottle, like his friends in Hollywood. Treatment is hard: narcissists think they're entitled to feel superior. If you're used to flying in the corporate jet, business class just doesn't cut it.