ok so I stumbled cross this becuse in n episode of ST:TNG (S3E01 "Evolution") there is mlfunction tht releses "nitrogen oxide" on the bridge nd everyone is coughing.
so I looked up different gses tht hve N nd O, none hve tht exct nme. noticed tht nitric oxide is pprently only produced when you brethe in through your nose:
Nasal breathing produces nitric oxide within the body, while oral breathing does not.
nywy the reference led to this rticle
Broke: breathing through your nose so you produce nitric oxide
Woke: breathing from a whipped cream canister so you can get high on nitrous oxide