inhalant

Intoxicative inhalants are a broad range of intoxicative drugs whose volatile vapors or gases are taken in via the nose and trachea. They are taken by room temperature volatilization or from a pressurized container (e.g., nitrous oxide), and do not include drugs that are sniffed after burning or heating. For example, amyl nitrite and toluene are considered inhalants, but tobacco, cannabis, and crack are not, even though the latter are also inhaled (as smoke).