ConditionMental health & sleep
Smoking and Tobacco Addiction (Nicotine Dependence)
Tobacco addiction, or nicotine dependence, is a chronic, relapsing condition in which nicotine changes the brain's reward system so that people keep using cigarettes, vapes, cigars or smokeless tobacco despite wanting to stop. Signs include strong cravings, smoking soon after waking, and irritability, anxiety and restlessness when you go without. Most smokers want to quit, and it often takes several attempts. Combining stop-smoking medicines, such as varenicline or combination nicotine replacement, with counseling gives the best chance of success.
Also called: Nicotine dependence, tobacco use disorder, smoking addiction, nicotine addiction
At a glance
- What it is
- Dependence on nicotine with compulsive tobacco use.
- Signs
- Smoking within 30 minutes of waking, cravings, failed quit attempts, withdrawal when stopping.
- Withdrawal
- Irritability, anxiety, poor concentration, restlessness, hunger, sleep problems; peaks in days, eases over 2 to 4 weeks.
- Most effective medicines
- Varenicline; combination nicotine replacement (patch plus short-acting form); bupropion.
- Support
- Quitlines (1-800-QUIT-NOW in the US), counseling, apps and text programs.
- Success
- Medicine plus support more than doubles quit rates.
When to get help
Call 911 or go to the ER
- Thoughts of suicide while quitting or on any medicine: call or text 988 (US) or call 911
- Chest pain, sudden breathlessness or stroke symptoms
- A child who has swallowed nicotine liquid, gum, lozenges or cigarettes (call Poison Control at 1-800-222-1222, or 911 if symptoms)
See a doctor within a day or two
- Severe mood changes, agitation or depression while quitting
- Vomiting, dizziness and racing heart from too much nicotine (for example, smoking while using patches)
Book a routine appointment
- Wanting to quit smoking or vaping: ask your doctor or pharmacist, or call 1-800-QUIT-NOW
- Smoking during pregnancy or planning pregnancy
- Repeated relapses despite trying to quit
How nicotine addiction works
Nicotine reaches the brain within about 10 seconds of inhaling. It binds to nicotinic receptors and releases dopamine, producing pleasure and relief. With repeated use, the brain adds more receptors and adapts, so you need nicotine to feel normal. When nicotine levels drop, withdrawal symptoms appear, driving the next cigarette.
Habits and cues, such as coffee, driving, stress, meals and alcohol, become strongly linked to smoking, so quitting means breaking both physical dependence and routines.
E-cigarettes and other nicotine products can cause the same addiction, especially in teenagers, whose brains are more sensitive to nicotine.
Signs of nicotine dependence
- smoking or vaping within 30 minutes of waking
- strong cravings or urges
- smoking more or longer than intended
- trying to cut down or quit without success
- continuing despite health problems such as cough or breathlessness
- giving up activities where you cannot smoke
- withdrawal symptoms when stopping
Doctors may use the Fagerström Test for Nicotine Dependence, which scores factors such as time to first cigarette and cigarettes per day.
Nicotine withdrawal
| Time after last cigarette | What to expect |
|---|---|
| 2 to 4 hours | Cravings begin |
| 1 to 3 days | Peak symptoms: irritability, anxiety, restlessness, poor concentration, headache |
| 1 to 2 weeks | Symptoms gradually ease; increased appetite and sleep changes |
| 2 to 4 weeks | Most physical symptoms resolve |
| Months | Occasional strong cravings triggered by cues |
Other common effects: low mood, coughing as the lungs clear, constipation and weight gain (average around 4 to 5 kg, or 9 to 11 lb). Medicines reduce withdrawal and cravings. See withdrawal syndrome.
Treatment
Medicines
| Medicine | How it works | Notes |
|---|---|---|
| Varenicline | Partially activates nicotine receptors, reducing cravings and the reward from smoking | Single most effective medicine; nausea and vivid dreams common |
| Combination nicotine replacement (NRT) | Patch for steady levels plus gum, lozenge, inhaler or spray for cravings | As effective as varenicline; available over the counter |
| Bupropion | Antidepressant that reduces cravings | Avoid with seizure disorders or eating disorders |
| Cytisine | Plant-based compound similar to varenicline | Used in some countries |
Start medicines 1 to 2 weeks before your quit date (varenicline, bupropion) or on the day (NRT). Use for at least 12 weeks; longer use helps prevent relapse. Large studies have found that varenicline and bupropion do not significantly increase serious psychiatric events compared with NRT, but report any mood changes promptly.
Behavioral support
- quitlines: free phone counseling (1-800-QUIT-NOW in the US)
- individual or group counseling
- text and app programs such as smokefree.gov tools
- cognitive behavioral strategies: identifying triggers, planning alternatives, managing stress
Special situations
- Pregnancy: counseling is first-line; NRT may be used with medical advice. Quitting at any stage of pregnancy benefits the baby.
- Teens: counseling is the main approach; medicines are used with caution.
- Mental health conditions: people with depression, schizophrenia or substance use disorders smoke at higher rates and benefit from quitting with support.
E-cigarettes as a quit aid
Some adults use e-cigarettes to quit smoking, and evidence suggests nicotine vapes can help some people stop smoking. They are not FDA-approved for quitting, contain addictive nicotine and have uncertain long-term effects. The goal should be to stop smoking completely and eventually stop vaping too.
Tips for your quit attempt
- set a quit date and tell friends and family
- remove cigarettes, lighters and ashtrays
- plan for triggers: change routines after meals and with coffee
- avoid alcohol early on
- keep hands and mouth busy: sugar-free gum, toothpicks, stress balls
- exercise to reduce cravings and weight gain
- delay, distract and breathe deeply during cravings, which pass within minutes
- if you slip, do not give up; learn from it and continue
Health benefits of quitting
Quitting at any age adds years of life and reduces risks of heart disease, stroke, lung cancer, COPD and many other diseases. See smoking problems for the health effects of smoking and the benefits timeline after quitting.
Frequently asked questions
What are the signs of nicotine addiction?
Signs include smoking or vaping soon after waking, strong cravings, failed attempts to quit, continuing despite health problems, and irritability, anxiety or restlessness when you go without nicotine.
How long does nicotine withdrawal last?
Withdrawal symptoms peak in the first 3 days and usually ease over 2 to 4 weeks. Cravings triggered by habits and situations can occasionally occur for months, but they become weaker and less frequent over time.
What is the most effective way to quit smoking?
Combining a stop-smoking medicine, such as varenicline or combination nicotine replacement therapy, with behavioral support from a quitline, counselor or program is most effective. This more than doubles the chance of quitting compared with willpower alone.
Is varenicline safe?
Varenicline is generally safe and is the most effective single quit medicine. Common side effects are nausea, vivid dreams and sleep problems. A large study found no significant increase in serious psychiatric events. Report mood changes to your doctor.
Can you get addicted to vaping?
Yes. Most e-cigarettes contain nicotine, sometimes at high levels, and cause the same addiction as cigarettes. Young people are particularly vulnerable. The same quit treatments, especially counseling and nicotine replacement, can help people stop vaping.
Sources
This guide was written from current patient and clinical guidance, including:
- US Public Health Service: Clinical practice guideline, treating tobacco use and dependence
- US Surgeon General: Smoking cessation, a report of the Surgeon General (2020)
- American Thoracic Society: Clinical practice guideline on initiating pharmacologic treatment in tobacco-dependent adults (2020)
- US Preventive Services Task Force: Interventions for tobacco smoking cessation in adults (2021)
- CDC: How to quit smoking