Evidence-based support for becoming smoke-free

Smoking Cessation: Your Questions Answered

Stopping smoking is one of the most important steps you can take to protect your lungs, heart and long-term health. Quitting can be difficult because tobacco dependence involves both nicotine addiction and established daily habits. The right treatment and behavioural support can make the process considerably more manageable.

Preparing to quit
Nicotine withdrawal
Nicotine replacement
Varenicline
Cytisinicline
Bupropion
Nicotine vaping
Relapse prevention

You do not need to rely on willpower alone

Behavioural support combined with an appropriate stop-smoking product generally offers a better chance of success than attempting to quit without support.

A previous attempt was not wasted

Many people need more than one quit attempt. Each attempt can reveal triggers, withdrawal patterns and treatments that should be changed next time.

Why is smoking a threat to health?

Tobacco smoke contains thousands of chemicals. Many are toxic, and some cause cancer. Smoking damages the lungs, blood vessels, heart and numerous other organs while also exposing people nearby to second-hand smoke.

Burning tobacco produces a mixture of particles and gases that reaches deep into the lungs. Repeated exposure causes inflammation, oxidative injury, abnormal cell changes and damage to the blood vessels.

Smoking increases the risk of chronic obstructive pulmonary disease , lung cancer, heart disease, stroke, peripheral vascular disease and many other illnesses. It can also worsen asthma, reduce resistance to respiratory infection and delay healing.

Nicotine

Nicotine drives dependence by acting on reward pathways in the brain. It is not the main cause of smoking-related cancer, but it makes continued tobacco exposure difficult to stop.

Tar and particles

Smoke particles deposit in the respiratory tract and contain carcinogens and other substances that injure airway and lung tissue.

Carbon monoxide

Carbon monoxide binds to haemoglobin and reduces the amount of oxygen the blood can carry effectively.

Irritant gases

Irritating chemicals damage airway lining, impair mucus clearance and contribute to cough, sputum and respiratory inflammation.

It is never too late to stop

Quitting benefits people who have smoked for a short time and those who have smoked for decades. It also remains important after a diagnosis of COPD, heart disease or cancer.

What happens after you stop smoking?

Recovery varies between individuals, but the body begins responding after smoking stops. Carbon-monoxide exposure falls, circulation improves and the continuing injury caused by inhaled tobacco smoke is removed.

Early changes

Smoke exposure stops

Nicotine and carbon monoxide begin leaving the body. Cravings and withdrawal may also begin during this early period.

Over weeks

Breathing may feel easier

Circulation and exercise tolerance may improve. Some people temporarily cough more as airway clearance changes.

Over months

Cough may reduce

Cough, sputum and breathlessness may improve, although established lung disease may continue to cause symptoms.

Long term

Health risks fall

The risks of cardiovascular disease, cancer and continuing smoking-related lung damage decline over time.

Quitting after a COPD diagnosis still matters

Smoking cessation cannot reverse all established emphysema or airway damage, but it can slow further smoking-related decline and improve the effectiveness of the wider treatment plan.

How should I prepare to stop smoking?

A quit attempt is easier to manage when it is planned. Preparation should be practical rather than dependent on motivation alone.

Write down why you want to stop Health, family, finances, fitness, fertility or freedom from dependence may all be meaningful reasons.
Choose a quit date Select a realistic date that allows enough time to organise treatment and support without postponing indefinitely.
Identify your smoking pattern Record when, where and why you smoke. Common triggers include alcohol, coffee, driving, stress, finishing meals and social situations.
Choose stop-smoking support Contact a local Stop Smoking Service, pharmacist or clinician and discuss suitable treatment before the quit date.
Remove tobacco and smoking equipment Dispose of cigarettes, lighters, ashtrays and hidden supplies from the home, car and workplace.
Tell supportive people Explain how family, friends or colleagues can help and ask people not to offer cigarettes.
Plan for predictable cravings Prepare nicotine replacement or another treatment and decide what you will do during high-risk situations.
Review previous attempts Identify what helped, when relapse occurred and what needs to be different this time.

Is a sudden quit date essential?

Some people stop completely on a chosen date. Others reduce first while working towards a definite quit date. Reduction can be a useful route when it is structured and supported, but simply smoking fewer cigarettes indefinitely still exposes the lungs and cardiovascular system to tobacco smoke.

What nicotine-withdrawal symptoms should I expect?

Withdrawal occurs because the brain and body have adapted to regular nicotine. Symptoms are uncomfortable but usually temporary. Stop-smoking treatment can reduce their intensity.

Strong cravings

Cravings tend to come in waves. They often pass within a few minutes even though they feel intense at the time.

Irritability or low mood

Mood changes, frustration, restlessness or anxiety can occur while nicotine withdrawal settles.

Poor concentration

Concentration may temporarily become more difficult, especially during the first days of a quit attempt.

Sleep disturbance

Sleep may be lighter or interrupted. Some treatments can also influence sleep and may need adjustment.

Increased appetite

Appetite and taste may increase. Planning regular meals and healthier snacks can reduce unplanned eating.

Cough or throat changes

A temporary increase in cough can occur as smoking stops and mucus clearance changes. Persistent or concerning symptoms still require assessment.

The four Ds for a craving

Delay acting on the urge, take slow Deep breaths, Drink water and Do something else. Combine these techniques with the stop-smoking treatment selected for you.

What nicotine-replacement therapy options are available?

Nicotine-replacement therapy provides nicotine without inhaling burning tobacco. It reduces cravings and withdrawal while avoiding tar, carbon monoxide and the many toxic products of combustion.

NRT is available in slow-acting and fast-acting forms. Combining a patch with a quicker product is often more effective than relying on one product alone.

Nicotine patches

Patches provide a steady nicotine level through the skin and form a useful background treatment for daily withdrawal.

Different strengths

The starting strength depends on tobacco consumption, morning cravings and the individual product instructions.

Day or 24-hour use

Some patches are worn while awake and others for 24 hours. Sleep disturbance or morning cravings may influence choice.

Gum and lozenges

These deliver nicotine through the lining of the mouth and can be used when cravings occur.

Sprays

Mouth or nasal sprays act quickly and may suit people with abrupt, intense cravings.

Nicotine inhalator

The inhalator delivers nicotine through the mouth and can also replace part of the hand-to-mouth ritual.

Combination NRT

A common approach is a nicotine patch for continuous control plus gum, a lozenge, spray or inhalator for breakthrough cravings. Correct technique and adequate dosing matter. A pharmacist or stop-smoking adviser can help select an appropriate combination.

Do not abandon NRT because of one difficult craving

Some people use too little nicotine replacement or stop it too early. Review the dose, technique and combination with a healthcare professional rather than assuming the treatment has failed.

Which medicines can help me stop smoking?

Several non-nicotine medicines are available in the UK. Choice depends on age, pregnancy status, kidney function, other medicines, medical history, previous treatment and local availability.

Treatment	How it can help	Important considerations
Varenicline	Reduces cravings and withdrawal while making smoking less rewarding	Usually started before the quit date; dose adjustment may be needed with kidney impairment
Cytisinicline	Acts on nicotine receptors to reduce cravings and the reward associated with smoking	Uses a defined short dosing schedule and an early quit date; not recommended by NICE for people aged 66 or over
Bupropion	Can reduce nicotine withdrawal and the urge to smoke	Not suitable for everyone, including some people with a seizure risk or particular medical conditions
Nicotine replacement	Replaces nicotine without tobacco smoke and reduces withdrawal symptoms	Combining a patch with a fast-acting product can improve craving control
Nicotine-containing vape	Can replace cigarettes while supplying nicotine without burning tobacco	Intended for adult smokers; complete replacement of cigarettes is important

Medicine choice requires an individual check

Varenicline, cytisinicline and bupropion are not offered to people under 18 under current NICE guidance. They are also not used during pregnancy or breastfeeding. Discuss suitability and possible interactions with a prescribing professional.

Can vaping help me stop smoking?

For an adult who smokes, switching completely from cigarettes to a regulated nicotine vape can substantially reduce exposure to the toxic products created by burning tobacco. Vaping is not harmless, but smoking cigarettes is considerably more harmful.

Nicotine vaping can help some adults manage withdrawal while replacing behavioural aspects of smoking. It should be considered within a quit plan rather than as a reason to continue smoking cigarettes.

Complete switching matters

The main health benefit occurs when cigarettes are stopped completely rather than when vaping is simply added to ongoing smoking.

Nicotine strength matters

A product that delivers too little nicotine may leave cravings uncontrolled and increase the risk of returning to cigarettes.

Avoid unregulated products

Use products from reputable UK retailers and do not add substances that were not designed for the device.

Review ongoing use

Remaining smoke-free is the immediate priority. Nicotine and vaping can be reduced later when the risk of returning to smoking is lower.

Vaping is not recommended for children or non-smokers

Nicotine vaping is an option for adult smokers attempting to quit. People who do not smoke should not begin vaping. Pregnant patients should discuss licensed nicotine-replacement therapy with their maternity or stop-smoking team.

Is stopping smoking “cold turkey” harmful?

Abruptly stopping cigarettes is generally not physically harmful, although nicotine withdrawal can be uncomfortable. The difficulty is that untreated cravings may make relapse more likely.

Some people successfully stop without medication. Others do better with nicotine replacement, a stop-smoking medicine, vaping or structured behavioural support. Using treatment is not a sign of weak willpower; tobacco dependence is a recognised health condition.

Is gradual reduction better?

Gradual reduction and abrupt quitting can both be used. A gradual approach should still have a clear plan, suitable nicotine or medicine support and a target for becoming completely smoke-free.

Which behavioural strategies improve a quit attempt?

Stop Smoking Service

Trained advisers can help select treatment, plan the quit date, review cravings and adjust the strategy.

Individual counselling

One-to-one support can identify personal triggers, routines and thoughts that increase the urge to smoke.

Group support

Shared experience, accountability and practical suggestions can help some people remain engaged.

Cognitive behavioural strategies

These approaches help challenge automatic thoughts and develop alternative responses to stress and cravings.

Exercise

Appropriate activity can provide distraction, improve mood and support wider cardiovascular and respiratory health.

Mindfulness and breathing

Brief grounding or breathing exercises can help a person stay with a craving until it passes.

Combine support with treatment

Behavioural support and a suitable stop-smoking product address different parts of tobacco dependence. Combining them can improve the likelihood of remaining smoke-free.

What if I am pregnant or breastfeeding?

Stopping smoking during pregnancy benefits both the pregnant person and the baby. Specialist support should be offered promptly rather than waiting until after delivery.

Nicotine replacement may be considered

NICE supports NRT alongside behavioural support during pregnancy when it helps someone stop smoking. Treatment selection and instructions should be discussed with the maternity or stop-smoking team.

Medicines requiring avoidance

Current NICE guidance advises against varenicline, cytisinicline and bupropion during pregnancy or breastfeeding. Do not start or stop treatment without discussing it with the relevant healthcare team.

Can stopping smoking affect my other medicines?

Tobacco smoke alters the way the body processes some medicines. When smoking stops, levels of certain medicines can rise even though nicotine itself has been replaced.

Tell your GP, pharmacist, mental-health team and other prescribers that you are stopping. Medicines that may require closer review include some antipsychotic medicines and theophylline. Caffeine may also feel stronger after smoking stops.

Do not change prescribed doses yourself

Medication monitoring should be arranged by the responsible prescriber. Seek advice promptly if you develop marked drowsiness, agitation, tremor, palpitations or another unexpected symptom after stopping smoking.

What should I do after a slip or relapse?

Smoking one cigarette does not erase the progress already made. Treat it as useful information, stop again promptly and identify what allowed the cigarette to happen.

Stop the slip from becoming a return to smoking Dispose of remaining cigarettes and resume the quit plan as soon as possible.
Identify the trigger Consider alcohol, stress, social pressure, uncontrolled craving or stopping treatment too early.
Continue or review treatment Do not automatically stop NRT or other support. Ask whether the dose or approach needs changing.
Contact your support service An adviser can help revise the plan without judgement.
Plan for the same situation Decide exactly what you will do if the trigger occurs again.
Set another quit date when needed A full relapse is a reason to restart treatment, not a reason to abandon the goal.

Should a smoker have a respiratory assessment?

Smoking cessation support does not require lung tests in every person. Respiratory assessment is appropriate when symptoms, smoking exposure or another risk factor raises concern about established lung disease.

Persistent cough

A cough lasting several weeks, especially with sputum or a changing pattern, deserves clinical review.

Breathlessness

Reduced exercise capacity, difficulty climbing stairs or breathlessness during normal activity may require lung-function testing.

Wheeze

Recurrent wheeze may indicate asthma, COPD or another airway problem.

Coughing blood

Haemoptysis requires medical assessment and should not be attributed to smoking irritation without investigation.

Recurrent chest infections

Repeated infections can be associated with COPD, bronchiectasis or another underlying condition.

Lung-cancer risk

Some current or former smokers may be eligible for an NHS lung health check or may wish to discuss private lung-cancer screening .

Respiratory investigations may include spirometry and other lung-function tests , chest imaging or further assessment according to symptoms and clinical risk.

Seek urgent medical help for:

severe or rapidly worsening breathlessness;
coughing more than a small streak of blood;
new severe chest pain;
blue or grey lips;
collapse, fainting or confusion;
signs of a stroke or heart attack.

Call 999 for severe breathing difficulty, heavy bleeding, collapse or another immediately life-threatening symptom.

Conclusion

Stopping smoking is one of the most effective ways to protect respiratory and cardiovascular health. Benefits occur at every age, including after a diagnosis of COPD, heart disease or cancer.

Tobacco dependence is driven by nicotine withdrawal, learned routines and emotional or social triggers. A firm decision is helpful, but willpower does not have to carry the whole burden.

Current options include behavioural support, combination nicotine replacement, varenicline, cytisinicline, bupropion and nicotine-containing vapes for adult smokers. Treatment should be selected according to medical history, preference, previous quit attempts and local availability.

A slip is not a failure. Restart the plan, continue appropriate support and use the experience to strengthen the next attempt.

People with persistent cough, breathlessness, wheeze, recurrent infections or a substantial smoking history may also benefit from a specialist respiratory assessment .

Frequently asked questions

What is the most effective way to stop smoking?

Combining behavioural support with an appropriate stop-smoking product generally offers the best chance of success. The most suitable treatment varies between people.

Is nicotine replacement safer than smoking?

Yes. NRT supplies nicotine without burning tobacco and avoids the tar, carbon monoxide and many toxic chemicals in cigarette smoke.

Can I use a nicotine patch and gum together?

Yes. A patch can provide steady nicotine while gum, lozenges, spray or an inhalator manage sudden cravings. Ask a pharmacist or adviser about appropriate strengths.

Is varenicline available again in the UK?

Yes. Varenicline has returned to UK stop-smoking treatment, although access may depend on local prescribing and Stop Smoking Service arrangements.

What is cytisinicline?

Cytisinicline, also called cytisine, is a non-nicotine stop-smoking medicine that acts on nicotine receptors. It uses a defined dosing schedule and early quit date.

Can vaping help me quit cigarettes?

A regulated nicotine vape can help some adult smokers stop. The aim should be to replace cigarettes completely rather than continue smoking and vaping together.

Is vaping harmless?

No. Vaping is not risk-free and can maintain nicotine dependence. However, for an adult smoker, completely switching from cigarettes to vaping substantially reduces exposure to tobacco-combustion toxins.

Is it dangerous to stop smoking suddenly?

It is generally not dangerous, but withdrawal may be uncomfortable. Treatment and support can reduce cravings and improve the chance of remaining smoke-free.

How long do nicotine cravings last?

Individual cravings usually pass within minutes, although repeated urges are common during the early weeks. Their frequency and intensity generally reduce with time.

Will I gain weight after stopping?

Some people gain weight because appetite and taste improve or food replaces smoking. Planning meals, remaining active and treating withdrawal can help. The health benefits of quitting remain substantial.

What should I do if I smoke one cigarette?

Stop again immediately, continue appropriate treatment and identify the trigger. One cigarette does not have to become a full relapse.

Can I use stop-smoking medicine during pregnancy?

NRT may be considered with behavioural support. NICE advises against varenicline, cytisinicline and bupropion during pregnancy or breastfeeding. Seek specialist advice.

Will my lungs return completely to normal?

Some symptoms and functions may improve, but established emphysema, scarring or other permanent damage may not reverse. Stopping still prevents continuing tobacco-smoke injury.

References and further information

National Institute for Health and Care Excellence. Tobacco: preventing uptake, promoting quitting and treating dependence. NICE guideline NG209, updated February 2025. View the NICE guideline
NHS Better Health. Find the best stop-smoking product for you. View NHS stop-smoking treatment information
NHS Better Health. Quit smoking with nicotine-replacement therapies. Read about nicotine-replacement therapy
NHS Better Health. Quit smoking with nicotine-free medicines. Read about varenicline, cytisinicline and bupropion
London Chest Specialist. Vaping and potential lung-disease complications. Read about vaping and respiratory health
London Chest Specialist. COPD diagnosis and treatment. Read about specialist COPD care
London Chest Specialist. Lung-function tests. Read about respiratory testing
London Chest Specialist. Private lung-cancer screening. Read about lung-cancer screening