jodie sweetin smoking cigarettes on Comedy, Community, and Bringing 'Smoke Show' to San Francisco Season 7, Episode 5, “Fast

[22] Military [edit] Drugs used by militaries [edit] Militaries worldwide have used or are using various psychoactive drugs to treat pain and to improve performance of soldiers by suppressing hunger, increasing the ability to sustain effort without food, increasing and lengthening wakefulness and concentration, suppressing fear, reducing empathy, and improving reflexes and memory-recall among other things

So back to the initial application, 3-4 sprays is absolutely adequate but be prepared for a fairly brief chemical attack

S., Donny, E

In the case of other components of the smoke stream (methane, ethane, ethylene, isoprene, benzene, toluene and crotonaldehyde), significant reductions of between 30% -60% have been achieved