Pedantic on
No - it is Nitric Oxide. Used as a vasodilator in neonates, usually as a last resort before ECMO is considered.
However, in males it is better known as the signalling molecule that gives you an erection. I suppose you could overdose on it - but what a way to go!
Cue the joke about closing the coffin lid.
Pedantic off
BTW Anything good to report from the SARF Conference?