Cigarettes contain nicotine, which is the substance responsible for the addiction. Once nicotine reaches the brain, it will release chemicals called norepinephrine and dopamine, both of which make us feel good.
However, this nicotine high does not last very long. Soon you will get a tolerance to nicotine, which means you will have smoke more cigarettes to get the same pleasurable feeling. Just like any other addiction, the problem is that once you stop the supply of nicotine, you will feel weak and down. This will stimulate you to get your next puff. Hence your brain is now addicted to cigarettes.
If you really want to quit smoking, you must identify the situations that trigger you to smoke and do your best to avoid them.
BE aware, according to American Lung Association, the health benefits of quitting will begin just 20 minutes after your last cigarette. Your blood pressure and heart rate will decrease, and the oxygen content of your body will increase. By the time you reach 15 years of never touching a cigarette, your risk of dying will be the same as a non-smoker.
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