Nicotine
Nicotine addiction is the physical dependence of your body to the powerful chemical, nicotine. Smoke from cigarettes, cigars, and pipes contain thousands of harmful chemicals, including nicotine. Nicotine produces physical and mood-altering effects in your brain that are pleasing. ... Anyone who smokes is at risk of becoming addicted to nicotine. Nicotine is one of the most addictive chemicals in the world. ... One of the most powerful chemicals is nicotine. It is the nicotine that keeps you smoking. Nicotine can be as addictive as cocaine. ... These behaviors and routines that you associate with smoking have to be addressed if you are to overcome the addiction to nicotine. (Rustin) Tobacco smoke contains tiny bits of carbon, carbon monoxide and other gases, nicotine, and tar, which are present as microscopic droplets. ... Nicotine, the chemical that causes addiction, dissolves in the tiny droplets of tar, and the tar carries the nicotine into the lungs. ... If the smoke is acidic, as in cigarette smoke, the tars and nicotine are mainly absorbed through the lungs. If the smoke is alkaline, as in pipe and cigar smoke, the tars and nicotine can be absorbed through the mouth and tongue as well as the lungs. ... There is no specific amount of nicotine that one has to consume before being addicted.