Nitrous Oxide can be used as a pain killer by medical professionals. It is preferred by dentists because it doesn’t knock the patient unconscious unlike other anesthetics. It is administered through a mask with a mixture of oxygen and is a safe and effective anesthetic. It is also used by some people to feel high. Nitrous oxide has the nickname of “laughing gas”. Nitrous oxide is also typically used as the propellant in aerosol cans such as whipped cream and bug spray. Environmentally, Nitrous Oxide is a potent greenhouse gas.