Being an ex-smoker I am all too familiar with the effects of Nicotine. Honesty, considering that Nicotine is far more addictive than opiates like heroin, I would not recommmend using it as a stimmulant. True, Nictine effects people differently according to their brain chemistry, but I wouldn't take the chance to find out if you're one of the "normal" types where you need a fix roughly every 30 minutes, or the type that can casually use it and stop with little or no effort. Caffine withdrawl can last a couple of days, Nicotine withdrawl can last a lifetime. Not trying to bash your thread, but just my 2c.