The Difficulty in Kicking the Habit

Smokers may have started smoking because their friends did or because it seemed cool. But they keep on smoking because they became addicted to nicotine, one of the chemicals in cigarettes and smokeless tobacco. Nicotine is both a stimulant and a depressant. That means nicotine increases the heart rate at first and makes people feel more alert (like caffeine, another stimulant). Then it causes depression and fatigue. The depression and fatigue — and the drug withdrawal from nicotine — make people crave another cigarette to perk up again. According to many experts, the nicotine in tobacco is as addictive as cocaine or heroin.

But don't be discouraged; millions of Americans have permanently quit smoking.