I'm a recovering nitrous oxide addict so this is interesting, but people should proceed with caution. I didn't know laughing gas could be addictive for some people until it was too late. In the film Cider House Rules, Michael Caine plays a doctor addicted to ether for sleep https://en.wikipedia.org/wiki/The_Cider_House_Rules_(film) Google result: Is chloroform stronger than ether? Fluothane and chloroform produced si…
I'm sure you know but PSA for those that don't: N2O is practically the only "safe" inhalant. Others, like gasoline, computer duster, urinal pucks, etc. have a risk of causing spontaneous heart attacks even in young healthy users. N2O's main physical risk is B12 deficiency, or asphyxiating if you use a mask.
In addition to the risk of sudden death, even on the first use, they cause permanent brain damage with each use and regular use will reduce you to a gibbering shell of yourself from which you cannot recover -- and then you'll probably die. Recreational use is incredibly dangerous and this is one category that you should probably put into the "never use" group. Much worse than any common recreational drugs, including the ones usually demonized by society such as heroin.