other than medical no2, nitrous has sulphur added to it so people wont huff it. and if its tried it will make u sick as a dog. thats a fact! when i was in shop the class was arguing with the instructor about nitrous. we had the whole " its an oxidizer" speech and thats when he showed us how sick it can make u, as he was talking about it, he picked up the full bottle he had and went "SEE"!!!!! as he cracked the nozzle right in my buddies face (aka sprint72) it was funny until he had to go home because he was so sick.
in my experience, your first run on nitrous will have you giggling like a little girl. every person ive taken for a first ride on nitrous is giggling by the end of the run. so the addage of laughing gas is two sided.
