Amyl nitrite poppers.
One the night of 11-12 Sep 2012, reports are that Zero was incapacitated and unable to execute his responsibilities as POTUS. My guess is the NOX whippets, which can cause blackouts.
My suspicion, too, is that he's still in to all kinds of drugs and dangerous behaviors. There's a media blackout on his hidden, homosexual life, and we might not learn of it for a long time. Eventually someone will write a tell-all, but probably long after Hussein no longer occupies the White House.