Is there a generic version of nitrous oxide?

Nitrous oxide, or laughing gas, is available to dentists and doctors as a generic sedative. It is not sold as a branded prescription for the public; it is a form of sedation that is only available to your dentist or another medical professional. Your dentist will have nitrous oxide as well as the equipment needed to mix it with oxygen and administer it safely to children and adults.   

Nitrous oxide is the name of the active ingredient of a gas for which there is not a brand name. It contains nitrogen and oxygen and is commonly abbreviated as N2O. It is also known by several other names, including laughing gas, dinitrogen monoxide and dinitrogen oxide.