How soon do I feel benefits after quitting smoking?

Within about 20 minutes your heart rate and blood pressure start to fall, carbon monoxide clears from your blood within a day, and circulation and lung function improve over the following weeks to months.

Why does the I Quit programme focus on 28 days?

Because staying smoke-free for 28 days makes you about 5 times more likely to quit for good. HPB’s I Quit 28-Day Countdown is built around getting you through that critical early window.

What number do I call for help quitting in Singapore?

HPB’s QuitLine on 1800-438-2000 (toll-free) connects you with trained Quit Consultants. There is also a free I Quit app and counselling at participating pharmacies and clinics.

What quit methods actually work?

Behavioural support — counselling, QuitLine or the app — combined with a stopping aid such as nicotine replacement therapy or prescription medicine from a doctor. This works far better than willpower alone.

Can I use vaping to quit smoking?

No. E-cigarettes and vapes are illegal to buy, use or possess in Singapore and are not an approved quit aid. Use nicotine replacement therapy or see a doctor instead.

How to Quit Smoking in Singapore: I Quit & QuitLine

Written & reviewed by the BestDoctors.sg editorial team · Last updated 22 Aug 2026 · General information, not medical advice

Quick answer. Quitting brings benefits almost immediately – heart rate and blood pressure begin to normalise within about 20 minutes, and within a year your excess risk of coronary heart disease drops to roughly half that of a continuing smoker. In Singapore, the Health Promotion Board runs the free I Quit programme and its 28-Day Countdown: staying smoke-free for 28 days makes you about 5 times more likely to quit for good. Free support is available through QuitLine 1800-438-2000 and the I Quit app. The methods that work combine behavioural support with a stopping aid – nicotine replacement therapy or prescription medicine. Note that vaping is illegal in Singapore and is not a quit aid.

Quitting smoking is the single most powerful thing most smokers can do for their health – and you don’t have to do it on willpower alone. Free, proven support is available, and every attempt teaches you something for the next one.

Why quitting is worth it

The benefits start fast and keep growing: within about 20 minutes heart rate and blood pressure start to fall; within a day carbon monoxide clears from your blood; over 2–12 weeks circulation and lung function improve; and over 1–9 months coughing and breathlessness ease. Around 1 year smoke-free, your excess risk of coronary heart disease halves, and longer term your stroke and cancer risks continue to fall.

Singapore’s I Quit programme and the 28-Day Countdown

HPB’s I Quit is a free national programme offering personalised support to help you quit. Its centrepiece is the 28-Day Countdown: research shows that staying smoke-free for 28 days makes you about 5 times more likely to quit for good, so the programme breaks the hardest early weeks into daily steps with nudges and follow-up support.

Getting free help

Call QuitLine on 1800-438-2000 (toll-free) to speak with a trained Quit Consultant, use the I Quit app, or get free smoking-cessation counselling at participating touchpoints such as pharmacies and clinics. This support is confidential and free.

Methods that work

The most effective approach combines behavioural support (counselling, QuitLine or the app) with a stopping aid. Options include nicotine replacement therapy – patches, gum or lozenges, available over the counter – and prescription medicines from a doctor. Combining support with an aid roughly doubles your chances compared with willpower alone.

Managing cravings and relapse

Cravings usually peak in the first weeks and pass within minutes – delay, breathe deeply, drink water, distract yourself, and use your NRT. Withdrawal effects like irritability and poor concentration are temporary. A slip is a normal part of quitting, not failure – most people succeed after several attempts, so learn from it and keep going. Quitting also protects those around you from secondhand smoke, which particularly harms children and pregnant women.

Vaping is not a quit aid

E-cigarettes and vapes are illegal to buy, use or possess in Singapore and are not an approved way to quit. Penalties for possession or use rose in 2025. If you want to stop smoking, use NRT or see a doctor rather than switching to vaping.

Related healthy-living guides

Sources

Health Promotion Board (HPB), Singapore — I Quit programme and 28-Day Countdown (about 5× more likely to quit after 28 smoke-free days; QuitLine 1800-438-2000).
HealthHub — help someone quit smoking (QuitLine, SMS service, support channels).
World Health Organization — health benefits of smoking cessation (recovery timeline).
Health Sciences Authority (HSA) / Ministry of Health (MOH) — vaping is illegal in Singapore; enforcement and penalties.

General information only. This guide offers general healthy-living information for Singapore and is not personalised medical advice. If you have a medical condition, take regular medicines, or are pregnant, check with your doctor before making big changes. Recommended national screening is available through Screen for Life / Healthier SG. In a medical emergency, call 995.