Recreational use of nitrous oxide — often referred to as whippets or laughing gas — left a 23-year-old with frostbite in his mouth and throat, according to a report of the man’s case ...

Nitrous oxide is not a new discovery and dates back to 1772. It's been used for a few applications, such as a painkiller (particularly in dentistry) and an engine additive that enhances performance.

Research by the BBC shows that sites including Amazon and eBay are supplying the gas, also known as “nos”, alongside the canisters and balloons used to inhale it.. Nitrous oxide is the second ...