CausesBy Mayo Clinic staff
Nicotine is the chemical in tobacco that keeps you smoking. Nicotine is very addictive when delivered to the lungs by inhaling tobacco smoke. It increases the release of brain chemicals called neurotransmitters, which help regulate mood and behavior. One of these neurotransmitters is dopamine, which may improve your mood and activate feelings of pleasure. Experiencing these effects from nicotine in tobacco is what makes tobacco so addictive.
Nicotine dependence involves behavioral as well as physical factors. Behaviors and cues that you may associate with smoking include:
- Certain times of the day, such as first thing in the morning, with morning coffee or during breaks at work
- After a meal
- Drinking alcohol
- Certain places or friends
- Talking on the phone
- Stressful situations or when you're feeling down
- Sight or smell of a burning cigarette
- Driving your car
To overcome your dependence on tobacco, you need to deal with the behaviors and routines that you associate with smoking.
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