Nitrous oxide, known to many as laughing gas, is the most commonly used form of sedation in dentistry. Nitrous oxide sedation is very safe and effective. It is administered by having the patient inhale the gas, which is carefully monitored by your doctor. You will fall into a euphoric state and feel completely relaxed. For many people, any feelings of fear and anxiety fade away allowing you to sit back peacefully while your dental procedure is performed. Once the procedure is over, the effects of the nitrous oxide wear off fairly quickly and you will be able to drive yourself home and return to your daily activities.