Another problem is that smoking is usually not a one-shot deal. It can take only weeks or days for new smokers to become addicted. Why? Because cigarettes contain a drug called Nicotine, the ingredient that causes the addiction. Nicotine is a stimulant, which means it makes you feel a little hyper. The more you smoke, the more you want to continue to smoke. Your body becomes physically dependent on the drug and begins to crave it. This is what makes it so difficult to quit smoking once you've started
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