Dexamethasone is a steroid he's on. I was on it during my cancer treatment. It stopped me from sleeping - I'd be awake 5 nights on the trot and collapse on the 6th. Weird thing was I'd lie awake the entire night without tossing or turning or feeling bad in any way at all. I just lay there, mind completely blank, waiting for the dawn to show, so that I could get up and get on with thnigs. During the day I was boing boing boinging about non-stopto everyone's amusement. Trump's hyperactive tweeting and trying to climb a load of stairs like Spiderman all fits. Let's duck (even lower) if he has the same comedown as I did when the prescription runs out.