Inhalants are ubiquitous.
From gasoline, glue, acetone, lighter fluid and on and on there is no way to prevent a determined person from using inhalants.
The way they work is to dilate the blood vessels in the brain which then rebound and constrict, causing oxygen deprivation and the "rapture of the deep" sort of thing.
There are so may different items around modern life which can do this that it's impossible to prevent.
Arf