Nicotine is highly addictive. It reaches the brain quickly and reinforces repeated use, whether it comes from cigarettes, snus, nicotine pouches, vaping products or other sources. Tobacco smoke causes the greatest burden of disease because it contains thousands of chemicals produced by combustion, but smokeless tobacco and nicotine products are not harmless.
Signs of nicotine dependence
- strong cravings or feeling unable to cut down
- using nicotine soon after waking
- continuing despite health, financial or social harm
- needing more over time to get the same effect
- withdrawal symptoms when stopping
- organizing daily routines around nicotine use
Withdrawal symptoms
Stopping nicotine can cause irritability, anxiety, low mood, restlessness, poor concentration, increased appetite and sleep problems. Cravings are often strongest during the first days and gradually become less frequent. Withdrawal is uncomfortable but is usually not dangerous.
Smoking
Cigarette smoke damages nearly every organ. It increases the risk of cancer, chronic lung disease, stroke and heart and circulation disease. Second-hand smoke also causes disease in people who do not smoke. Stopping provides health benefits at any age, including after a smoking-related diagnosis.
Snus and smokeless tobacco
Snus is an oral smokeless tobacco product placed under the lip. It delivers nicotine and can maintain strong dependence. Smokeless tobacco products vary in composition, but they can damage gums and teeth, expose users to cancer-causing chemicals and increase health risks. They can also cause nicotine poisoning in children.
Tobacco-free nicotine pouches do not contain tobacco leaf, but they still deliver addictive nicotine. Their long-term health effects are still being studied. They can irritate the mouth and are particularly unsafe for children, adolescents and during pregnancy. Read more about protecting teeth and gums in Oral Health.
Pregnancy and young people
Nicotine can harm fetal development and is not safe during pregnancy. Professional cessation support can help choose the safest approach. Nicotine also affects the developing adolescent brain, and products should be kept locked away from children.
Effective ways to quit
A planned quit attempt with behavioral support and medication is more likely to succeed than relying on willpower alone. Options may include:
- individual, group, telephone or digital counseling
- nicotine replacement therapy such as patches combined with gum, lozenges or spray
- prescription or prescription medications such as varenicline or bupropion when appropriate
- identifying triggers and planning alternative actions for cravings
- follow-up support after a lapse
The choice of medication depends on the nicotine product used, medical history, pregnancy, age and local availability. Combining a long-acting nicotine patch with a faster-acting form can help some adults. Follow professional and product instructions.
Making a quit plan
Choose a quit date, remove products and reminders, tell supportive people and plan for high-risk situations such as alcohol, stress or social use. A lapse does not erase progress. Review what triggered it and restart promptly.
If you use several nicotine products, tell the clinician or pharmacist so total nicotine exposure can be considered.
When to get urgent help
Swallowed nicotine liquid, pouches or tobacco can cause poisoning. Symptoms may include nausea, vomiting, sweating, dizziness, confusion, weakness, abnormal heart rate, seizures or breathing problems. Contact your local poison service or emergency service immediately and do not induce vomiting unless instructed.
Seek urgent mental health support if stopping or changing nicotine use is accompanied by severe depression, thoughts of self-harm or an immediate safety risk.
Sources
- World Health Organization: Tobacco and nicotine
- CDC: How to quit smoking
- CDC: Health effects of smokeless tobacco
Reviewed: 28 August 2026
Medical disclaimer: This information is general and does not replace individual cessation advice, diagnosis or treatment from a qualified healthcare professional.