Tobacco has been used experimentally by cocktail-makers to create tobacco bitters by infusion in alcohol. Nicotine is highly soluble in alcohol and the lethal dose (60mg) is easily attained with a modest amount of tobacco. It is as poisonous as hydrogen cyanide. Infusion is much more effective than is smoking in extracting nicotine. You've been warned.
Reference: Darcy O'Neil is a chemist and has written about the risks of tobacco in cocktails for his blog, Art of Drink. If you are considering using tobacco, read it.