Nitrous oxide or ‘Happy Gas’ is a very effective but safe way to reduce anxiety and pain. It is administered with oxygen with a nasal mask which the patient uses to breath during the entire dental appointment. Nitrous oxide is a quickly taken up in the lungs and enters the brain giving a sense of euphoria and reducing the perception of pain. It does not cause any memory loss or loss of consciousness which is very helpful during most dental treatments. The recovery time is swift as the gas quickly exits the lungs and is cleared from the system with simple oxygen. There are no lasting effects so patients are able to leave straight away and drive or make their own way home.