It depends on what you mean by "give it," and that distinction is the whole answer.
Many states let a trained dental assistant monitor a patient who is already under nitrous oxide, but starting the gas and adjusting its concentration — administering and titrating — is usually reserved for the dentist, and in some states the hygienist.
A smaller number of states let assistants administer under direct supervision with specific training.
What you may do depends entirely on your state.
The short answer
Nitrous oxide scope for assistants splits cleanly into two acts, and states treat them differently. Monitoring a sedated patient — watching their response and comfort while the gas is running — is often permitted for assistants who've completed the required training. Administering — initiating the flow and adjusting (titrating) the concentration — involves dosing judgment and is usually reserved for the dentist, or the hygienist where a state allows it.
Some states do let trained assistants administer under direct supervision, and some don't allow assistants to be involved with nitrous at all.
So the honest answer is: monitoring, often; administering, usually not — but always check your state.
Nitrous is sedation — scope here is tightly regulated and state-specific
What nitrous oxide is and how it's used
Nitrous oxide — often called laughing gas — is an inhaled agent that produces minimal sedation and eases pain and anxiety, delivered as a nitrous-and-oxygen mix through a small nasal mask.
It helps nervous patients relax and tolerate treatment, and its effects come on and wear off quickly, so patients usually recover soon after the mask comes off.
Because it's sedation, its use is monitored closely: the concentration is matched to the patient, and someone keeps watch on how the patient is responding throughout the procedure.
Nitrous is the mildest end of the sedation spectrum — for the deeper levels an assistant never administers, see can a dental assistant give anesthesia or sedation.
Monitoring vs. administering — the crucial distinction
This is the entire scope question, so it's worth being precise. Administering nitrous means starting the gas and titrating it — dialing the concentration up or down to reach and hold the right level of sedation for that patient.
That's a dosing decision, which is why most states keep it with the dentist (or the hygienist, where permitted).
Monitoring means observing the patient once sedation is established: watching their color, breathing, and responsiveness, and alerting the dentist to any change.
Many states allow a trained assistant to do this.
The line between the two is judgment over the dose versus vigilance over the patient — and it's the line your state's rule is drawn along.
The training you need
In states that allow assistants to monitor — or, less commonly, administer — nitrous, it almost always requires a board-approved nitrous oxide course and often a specific certification or permit.
This is not a duty states let assistants pick up informally, precisely because it involves sedation.
Nitrous certification is one of the permits assistants commonly stack alongside others like radiology.
For how these state permits relate to national certification, see our guide to CDA vs. RDA and the dental assistant title maze.
How the rules vary by state
States fall along a spectrum.
Many permit trained assistants to monitor a patient on nitrous but reserve administering and titrating for the dentist or hygienist.
A smaller group allows assistants to administer under direct supervision with the required certification, and some states don't authorize assistants to work with nitrous at all.
These categories shift as practice acts are revised, and the exact boundary — especially around administering — is where states differ most.
Treat this as the shape of the range, not a ruling for your state; the only authority is your state dental board.
How to confirm your state's rule
Your state dental board publishes whether assistants may monitor or administer nitrous, the certification required, and the supervision level.
The ADAA's state pages are a helpful starting map, but the board is the authority where they differ.
Because nitrous is sedation, confirm your state's exact rule and hold the required certification before you monitor or touch the equipment, and note the date you checked — sedation rules are among the more actively revised.
Never exceed your authorized scope.
This article is general career information, not legal or medical advice. Sedation scope and certification rules vary by state and change over time — confirm current requirements with your state dental board.