Nicotine

Nicotine (C10H14N2) is a naturally occurring liquid alkaloid. It is an organic compound made out of carbon, hydrogen, nitrogen and sometimes oxygen. These chemicals have potent effects on the human body. A great no. of people are enjoying the pleasant effects of Alkaloids like caffeine, a mostly used alkaloid in the world.

Cigarettes contain 8 to 20 milligrams (mg) of nicotine (depending on the brand), but only approximately 1 mg is actually absorbed by your body when you smoke a cigarette.