Nitrous oxide is a non-allergenic, nonirritating gas that affects the central nervous system. It’s one of the safest forms of sedation available and patients who have used it report very few, if any, side effects. If you’re like most patients, you’ll begin to feel the nitrous oxide take effect within 3-5 minutes. Following treatment the effects of this gas are completely reversed within 3-5 minutes, simply by breathing normally. In fact, you will be able to safely drive home or to work following your appointment. Nitrous oxide is a safe, reversible adjunct to help you relax during treatment. You remain conscious throughout the procedure. Simply relax and breathe deeply through your nose.