How to start.
-
01
Set a date
Pick a quit day inside the next two weeks. Close enough that you can't drift, far enough to get medication and tell the people around you.
-
02
Get the meds first
Varenicline gets 21 to 25 people per 100 to quit versus 18 on single-form nicotine replacement. Ask your doctor before your date, not after you're struggling.
-
03
Map your triggers
Write down the five moments you always smoke: coffee, car, phone call, after dinner, first drink. Decide now what your hands do instead.
-
04
Plan for the slip
One cigarette is a data point, not a verdict. Write down what happened, keep your quit date, and carry on the same day.
Why it works.
-
Life-years
Adults who quit at ages 25 to 34, 35 to 44 and 45 to 54 gained roughly 10, 9 and 6 years of life respectively compared with those who kept smoking.
-
Longevity
Across 50 years of British doctors, persistent smokers died about 10 years younger than non-smokers, and stopping at 60, 50, 40 or 30 gained about 3, 6, 9 or 10 years.
-
Heart
Heart rate begins normalising within 20 minutes, excess carbon monoxide clears within 12 hours, and by one year the excess risk of coronary heart disease is roughly half a continuing smoker's.
-
Odds of success
Varenicline beat single-form nicotine replacement in a Cochrane review, with about 21 to 25 quitters per 100 versus 18 per 100.
Livingstone-Banks et al., 2023, Cochrane Database of Systematic Reviews
Who swears by it.
Barack Obama
Chewed Nicorette relentlessly after his daughter smelled smoke on him; Michelle confirmed he had quit in 2011.
Ben Affleck
Pack-a-day smoker; smoked his last cigarette in November 2005 after learning he would become a father.
Charlize Theron
Quit a three-pack-a-day habit in 2008 using the Kerry Gaynor hypnotherapy method.
John's take.
The part everyone gets wrong is treating this as a willpower contest. It isn’t. The evidence is blunt about it: unaided cold turkey holds for six months only about 3 to 5% of the time. If you’ve failed four times, that’s not a character flaw. You’re running the method with the worst odds in the field and expecting a different result.
What actually shifts the numbers is unglamorous. Medication moves you toward 21 to 25 quitters per 100 instead of a handful. Cochrane looked at over 150,000 smokers and put e-cigarettes, varenicline and cytisine at the top. None of that is heroic. It’s picking the tool with better odds and then using it properly.
The honest tradeoff: even the best medication leaves roughly three quarters of people still smoking at follow-up. So the real skill isn’t quitting once, it’s being willing to start again on attempt five without the shame spiral that makes people quit quitting. The number that keeps me interested is Jha’s: stop before 40 and you erase about 90% of the excess risk. That is an enormous return on a decision you’re allowed to make badly several times and still win.
Common questions.
Does quitting smoking cold turkey work?
Sometimes, but the odds are poor. Unaided cold-turkey attempts hold for six months only about 3 to 5% of the time, which is why most smokers need several attempts. Nicotine replacement raises your odds by roughly 50 to 60% over an unassisted try, and varenicline does better still: about 21 to 25 quitters per 100 versus 18.
What happens to your body after you quit smoking?
Heart rate begins normalising within 20 minutes and excess carbon monoxide clears within 12 hours. Lung function rises roughly 10% by 3 to 9 months. At one year, your excess risk of coronary heart disease is about half a continuing smoker's. The big longevity gains take longer, and they're the reason to bother.
Is it too late to quit if I'm over 40?
No. Across 50 years of British doctors, stopping at 60, 50, 40 or 30 gained about 3, 6, 9 or 10 years of life. Later quits gain less, but 3 extra years for stopping at 60 is not a small number. About half to two thirds of persistent smokers are eventually killed by the habit.
How many attempts does it take to quit smoking?
More than one, usually. Relapse is the norm rather than the exception, and even the best medication leaves roughly three quarters of users still smoking at follow-up. Treat each attempt as information: what time of day broke you, what you were holding, who you were with. Then run it again with that part fixed.
What is the most effective way to quit smoking?
Cochrane's network analysis of over 150,000 smokers ranks e-cigarettes, varenicline and cytisine as the most effective aids. Varenicline beat single-form nicotine replacement at about 21 to 25 quitters per 100 versus 18. Combine one of them with a fixed quit date and a decision made in advance about your trigger moments.
How many years does quitting smoking add?
It depends on when you stop. Adults who quit at 25 to 34, 35 to 44 and 45 to 54 gained roughly 10, 9 and 6 years respectively versus continuing smokers. Those figures come from large population cohorts, so they describe averages across big groups and can't predict any individual's result.