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Ease the nerves around your dental treatment with nitrous oxide.

Questions & answers

Nitrous oxide (“laughing gas”)

What is nitrous oxide?

This form of sedation is most commonly known as laughing gas. You will inhale this nitrogen-oxygen mixture through a mask covering your nose. As you breathe, you will slowly start to feel the effects of the sedation. You will relax into a calming state and feel peaceful while receiving your dental treatment.

Is nitrous oxide safe?

Nitrous oxide is safe when given in the correct doses. Each patient will be closely monitored while receiving sedation to ensure their safety and comfort. Some patients report feeling slight dizziness.

How long does nitrous oxide last?

You will feel the effects of the laughing gas wear off almost immediately after removing the mask. As soon as you start breathing without the mask, you will begin to feel normal again. It can take between three to five minutes.

Nitrous oxide (“laughing gas”)


Children and Family Dentistry and Braces of Framingham does offer nitrous oxide/oxygen analgesia – commonly known as "laughing gas" – for our more anxious pediatric patients.

Nitrous oxide can be used to calm a patient who has a dental phobia, low pain tolerance, physical handicaps, strong gag reflexes or needs major dental treatment. Nitrous oxide is very safe and has been used for over 100 years in medicine and dentistry. Nitrous oxide will not cause your child to sleep; rather, they will remain awake and responsive during the entire visit. This is not sedation or general anesthesia.


The gas is administered via a fitted mask placed over the nose. During the procedure, we administer more oxygen than children breathe in normal room air. This ensures a wide margin of safety. Local anesthetic is administered once the nitrous oxide administration has started. The effects of the gas (relaxation and reduced pain sensation) will last only a few minutes after the nitrous oxide is turned off, and 100% oxygen is given at the end of the procedure. Your child will be able to resume normal activities after the procedure – except for any activities we ask you to avoid, according to the nature of the dental treatment. Nitrous oxide rarely has side effects, although some patients may experience minor nausea and constipation. Your doctor will provide you with pre-and post-nitrous oxide/oxygen analgesia instructions.

Give us a call today if you have any questions or to make your appointment with our dentists and team!

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At Dentistry and Braces group, we believe that everyone deserves exceptional dental care, no matter their age or circumstance. For personalized, comprehensive dental care, contact our experienced dentists and make your appointment today.