... health reason for wanting to do so. So why do so many people smoke? Well cigarettes contain nicotine, which is an addictive drug. If a smoker attempts to give up without some form of nicotine supplement (for example, gum or patches), they may experience typical physical withdrawal symptoms including craving for nicotine, irritability, anxiety, difficulty concentrating, or restlessness. In February 2000, the Royal College of Physicians published a report on nicotine addiction which concluded that "Cigarettes are highly efficient nicotine delivery devices and are as addictive as drugs such as heroin or cocaine." Nicotine changes how your brain and your body function. It seems its effects are a contradiction: Nicotine can both invigorate and relax a smoker, depending on how much the body has been exposed to, how regularly the body is exposed to it, and the individual in question. Unfortunately for smokers, nicotine has many adverse consequences on the ...

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