Some children are given nitrous oxide/oxygen (commonly called laughing gas) to help them relax for dental treatment. Nitrous oxide/oxygen is a blend of two gases, oxygen and nitrous oxide and is given through a small breathing mask placed over the child’s nose. The gas is mild, easily taken, and quickly eliminated from the body. Nitrous oxide/oxygen gives most children a relaxed feeling and helps distract them. While inhaling nitrous oxide/oxygen, your child remains fully conscious and keeps all natural reflexes. This technique is a very safe, effective way to treat a mildly anxious child.