Concern is high regarding the new aerosol delivery method for caffeine by Aeroshot.  See ad here.

 Photo of aerosol caffeine dispenser - Aeroshot.

Several near deaths occured in Washington in 2011 when students drank the caffeine/alcohol combination in a "Four Locos" drink.  The interaction between large doses of caffeine and alcohol is not a well researched area--but it has proved a very dangerous combination for youth.   The new product poses dangers similar to that in Four Locos.  Without the bother of drinking a beverage slowly, the user can get the equivelent of six cups of coffee within a few minutes from a single Aeroshot for about $2.99 at the local gas station. 

U.S. Sen. Charles Schumer of New York wants the FDA to review AeroShot, saying he fears it will be used as a club drug that young people will take to allow them to drink until they drop.

CBS Article