Commonly known as "laughing gas", nitrous oxide is a colorless and odorless gas that is combined with oxygen and dispensed through a mask placed over your nose. It is considered the mildest form of sedation and is known to relax patients and even put them in a pleasant, dreamy state. Nitrous oxide will not put you to sleep, and the amount you receive can be controlled by Dr. von Lackum. You will remain cognizant enough to communicate, and the gas's effects wear off minutes after inhalation stops.