Oh, it just gets worse... I'm sure he'll cooperate fully - after a couple days of letting things in his bloodstream calm down.
Re: Ambien abuse,
"Abuse of this drug (specifically the Ambien brand) is becoming more common in young people. Abusers claim that "fighting" the effects of the drug by forcing themselves to stay awake will cause vivid visuals and a body high (see side-effects below.) Some recreational users report decreased anxiety, and even mild to moderate euphoria.
Recreational zolpidem use is speculated to lead to tolerance and dependence much more quickly than prescribed use. Recreational use is rising, as demonstrated by the use of street names for the pill, such as: "A-" (because of its sedative and calming effects, "A+" is a street name for Adderall, named so because of its stimulant effects) and "Zombie Pills" (Because of the waking sleep effect many users experience)."