Nitrous Oxide is a gas that's combined with Oxygen to produce a calming effect and a sense of wellbeing when inhaled. Many dentists use Nitrous Oxide to help a patient relax during dental treatments. When the dental procedure is over, the dentist will have the patient breathe only Oxygen for a few minutes to eliminate the effects of the Nitrous Oxide.
Unlike other sedations, the patient should have a clear head within minutes of coming off of the Nitrous Oxide allowing them to function normally with no lingering effects. Nitrous Oxide is also known as laughing gas.