Nitrous oxide, commonly known as laughing gas, is a colorless and odorless gas used in anesthesia to help patients relax and reduce pain during medical procedures. It works by depressing the central nervous system, leading to a state of sedation and euphoria. This makes it particularly useful in dental procedures and minor surgeries, where anxiety and discomfort can be significant. When administered, nitrous oxide is mixed with oxygen and inhaled through a mask or nosepiece. Its effects are rapid, allowing for quick adjustments to the level of sedation. Once the procedure is complete, the gas is discontinued, and patients typically recover quickly, returning to their normal activities shortly after.