Nitrous oxide is a colorless and odorless substance that’s also known as “laughing gas.” When inhaled, the gas slows down the body’s reaction time. This results in a calm, euphoric feeling.  Nitrous oxide gas works fast as a sedative, but it doesn’t take long for the effects to wear off.  Nitrous oxide is a safe, common sedation method that’s appropriate for adults and children.  Talk with your dentist before a procedure and share your medical history with them. Based on your current health, your dentist can determine whether you’re a candidate for this method of sedation.