Which gas is most popular as laughing gas?

The most common type of chemical used for recreational purposes is nitrous oxide, which is second only to carbon monoxide in popularity. Nitrous oxide can be found as a gas or a liquid, with the most common being a liquid called "whippets." Nitrous oxide is primarily used as an analgesic, anesthetic and sedative drug. It has also been reported that it can be implemented into healthy living by promoting oxygenation and reducing stress levels in the body. The most popular uses of nitrous oxide include dentistry, surgery and aerobics.