If you put out your last cigarette on 1 October, today is day three, and day three is where the NHS says nicotine withdrawal tends to hit hardest. Symptoms can start within a few hours of the last cigarette and are usually strongest across the first week, especially the first three days. The irritability, the broken sleep and the sudden, very persuasive thought that one cigarette would sort everything out are not signs of a weak character. They are what dependence looks like from the inside, which is why Stoptober, run every October since 2012, asks for 28 days rather than a heroic weekend.
If you have not started yet, nothing is lost, because the 28 days count from whichever morning you stop. There is also more to work with than there used to be: varenicline is available again, and a plant-derived medicine called cytisine is new to the UK.
What the first week is doing to your body
The NHS withdrawal list reads like a bad week at work: strong urges to smoke, trouble concentrating, restlessness, poor sleep, irritability, feeling anxious or low. On average those symptoms last three to four weeks, and for some people they linger for a few months, so 28 days is a first milestone and not a finish line. The less obvious point is that the same week is when the repair work is fastest. After 48 hours the carbon monoxide in your blood has fallen to a non-smoker's level, your lungs have started clearing mucus, and taste and smell begin to improve. By 72 hours the bronchial tubes are relaxing, so breathing feels easier and energy starts to climb. Set the two lists side by side and the misery of day three looks less like proof that quitting is failing and more like evidence that it is working. Circulation improves after two to twelve weeks, and between three and nine months lung function rises by up to 10 per cent, according to the NHS timeline.
Why 28 days is the number to aim for
People who reach 28 days smoke-free are five times more likely to quit for good, the NHS says, and that figure describes people who got there, so read it as a milestone rather than a spell. Day 29 is not automatically safe, and a slip on day 20 does not cancel the nineteen days before it. What the target gives you is something concrete to count towards. Cravings are hardest during those four weeks and often start to ease after them, whereas a vague plan to "cut down" offers neither the count nor the easing. One tension is worth knowing about: the NHS is blunt that even a single cigarette can drag you back into the cycle of cravings, and equally clear elsewhere that one puff is a lapse rather than a relapse.
Why going it alone is the harder route
Willpower on its own is the weakest tool you have.
About 5.3 million adults in the UK still smoked in 2024, or 10.6 per cent of everyone aged 18 and over, according to the Office for National Statistics, down from 11.9 per cent the year before. The NHS figures in the table come from different studies with different starting points, so do not add them together. Read them as a rough ranking: any support beats none, and a combination beats a single product.
| Tool | What the NHS says | How to get it |
|---|---|---|
| Local stop smoking service | Free expert help; about three times more likely to quit | GP, pharmacist or health visitor referral, or ring the service |
| Nicotine-free medicines (varenicline, cytisine, bupropion) | Ease cravings; with nicotine replacement, over five times more likely to quit | On prescription, via the service or a GP |
| Nicotine replacement (patches, gum, lozenges, sprays) | Lower doses of nicotine without the chemicals in smoke | Pharmacies, supermarkets, some other shops |
| Nicotine vape | Roughly twice as likely to quit as with patches or gum | Vape shops; some services give a starter kit |
Choosing your tools
Start with the free service
Local stop smoking services cost nothing, and the NHS says expert help from one roughly triples your chance of quitting for good. You will normally get a one-to-one appointment, though many areas also run groups and drop-ins in GP surgeries, pharmacies and high street shops, and some work by phone or online. At the first session you talk through why you smoke and what you have tried before, settle on a quit date and are offered a breath test that shows the carbon monoxide in your body. Support usually runs for up to 12 weeks, with an out-of-hours number for bad evenings. In England the free Smokefree National Helpline is 0300 123 1044, and Scotland and Wales run their own helplines.
Ring before you spend a penny in a vape shop or chemist. The adviser can match a product to how much you smoke, and some services hand out a free e-cigarette starter pack.
Medicines to ask about by name
Three nicotine-free medicines are proven to help: varenicline, cytisine and bupropion. Varenicline (formerly sold as Champix) and cytisine both block nicotine's effect in the brain, so a cigarette stops delivering the same reward, while bupropion, sold as Zyban, began life as an antidepressant and works on the brain chemicals behind cravings. All three are available on prescription, and whether one suits you, alongside any other medication or a pregnancy, is a conversation for your adviser or GP. Ask about pairing one with nicotine replacement first, since the NHS says that combination makes you over five times more likely to quit for good.
Patches, sprays and vapes
Nicotine replacement works because nicotine itself does not cause cancer, lung disease, heart disease or stroke; the other chemicals in smoke do most of the damage. The NHS favours a slow source such as a patch combined with a fast one such as a mouth spray for sudden cravings, and advises at least 12 weeks of use, because many people stop too early and the cravings return. Replacement products are safe in pregnancy, but check with a healthcare professional first.
A nicotine vape is the option people argue about, and the NHS position is straightforward. It is less harmful than smoking and one of the most effective ways to stop, and an estimate the NHS quotes puts the running cost at about a third of smoking once you own the kit. It is also not risk-free, the long-term effects are unknown, and the benefit only arrives if you stop smoking completely rather than doing both. Children and non-smokers should never vape, and the plan should eventually include stopping that too. Disposable vapes can no longer be sold in the UK, so you are choosing between refillable and pod devices.
Skip nicotine pouches as a quit tool. The NHS says independent evidence on their safety, and on how well they help people stop, is still thin, and recommends medicines, replacement products or vapes first.
Getting through the next fifteen minutes
Cravings last up to 15 minutes according to the NHS, and a few minutes according to its trigger guidance, so the job is to have something ready for a short window rather than for the whole month. A quick burst of activity helps (a walk round the block, a few push-ups), as do minty or sugar-free gum, carrot and celery sticks, and the NHS 4-5-6 breathing exercise: in through the nose for four seconds, hold for five, out through the mouth for six. The harder work is the routine around the cigarette. Coffee, a break at work, waiting for the bus and finishing a meal all sit on the NHS list of common triggers, and the advice is to steer clear of them for the first 28 days. Swap the morning coffee for juice, take a different route to work, brush your teeth straight after eating.
If a drink is where your earlier attempts fell apart, go without alcohol for these four weeks; the NHS says it weakens self-control.
What nobody mentions about week two
Expect the cough to get worse before it improves, because your lungs are clearing mucus, and the NHS reads that as a good sign. Appetite usually rises, since nicotine suppresses it; most people gain some weight, and the NHS says the health benefits of stopping far outweigh it. Mood is the one that surprises people. Many smokers believe a cigarette settles their nerves, yet once the withdrawal stage has passed, the NHS says, people who have quit report less anxiety, depression and stress than those who carry on, with benefits showing from as little as six weeks. If your mood stays low well beyond that, tell your GP rather than white-knuckling it. On the plus side, the NHS puts the average saving at around £49 a week, more than £2,500 a year, and its free Quit Smoking app tracks your progress and savings as you go.
What the new law changes, and what it does not
The Tobacco and Vapes Act received Royal Assent on 29 April 2026. From 1 January 2027 it becomes illegal to sell tobacco to anyone born on or after 1 January 2009. If you were born before that, your own ability to buy is untouched, and Cancer Research UK stresses that the law does not criminalise smoking. In February the government also opened a consultation on extending smoke-free rules to certain outdoor places, and it says it is putting record levels of funding into local stop smoking services.
If you slip
One cigarette on day nine is a lapse, and the NHS says to shrug it off and carry on. Going back to smoking regularly is a relapse, and then the advice is to work out what triggered it and set a new quit date, ideally within two weeks so you have time to plan. The two messages sit together more comfortably than they sound: the first is the rule you plan around, the second is the net if the plan fails. Relapse is part of the process for most people, and what the NHS suggests changing is the kit rather than your character. Add a medicine, combine nicotine products, or bring in an adviser if you tried alone last time.
Put 0300 123 1044 in your phone before you need it, and answer the few questions on the free Personal Quit Plan on the NHS Better Health website tonight. It returns tips on preparing for your quit date, working out your savings and handling your triggers.