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How soon after taking nitrous oxide will I feel its effects?

When nitrous oxide gas is administered, you will feel the effects within one to two minutes. The effects will wear off shortly after the gas is stopped.

Nitrous oxide, or laughing gas, works quickly. Within a few minutes of inhaling nitrous oxide through a small mask over the nose, you will feel relaxed or even sleepy. However, it doesn’t make you lose consciousness, allowing you to follow your dentist’s directions.

It wears off very quickly as well, so when the gas is turned off, the effects of sedation vanish almost at once. When the nitrous oxide is turned off, the dentist will switch the flow to pure oxygen, which helps flush the remaining nitrous oxide from the body.

Continue Learning about Nitrous Oxide

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.