Injection or intravenous (into a vein) methods require more experience to be administered and monitored properly. Injections and intravenous medications should be used only by dentists with extensive training in these techniques.
Patients who are more anxious may need an oral medication that is stronger than nitrous oxide. With oral sedation, the patient may be sleepy but can be aroused and will respond to simple commands.
Nitrous Oxide Sedation
The calming inhalant known as laughing gas is for patients who are mildly or moderately anxious or nervous. It eases their anxieties so that they can relax and undergo treatment comfortably and safely.