Written for Stock My Medicine and clinically reviewed by Hajra Dhanchora, MPharm (GPhC 2216990).
Nicotine gum is the rescue tool of quitting: it answers a craving in minutes, which a patch can't. It's also the stop-smoking aid most people use wrongly, chewing it like ordinary gum and concluding it doesn't work. With Stoptober on 1 October, here's how it works, how to pick the strength, and the technique that makes the difference.
How does nicotine gum work?
The nicotine is absorbed through the lining of your mouth, not your stomach, so it reaches the blood in a few minutes and takes the edge off a craving without any smoke. Swallowed nicotine, on the other hand, is mostly wasted and gives you hiccups and indigestion, which is why the chewing technique matters so much.
How to use nicotine gum: chew and park
Chew a piece slowly, about ten to fifteen chews, until you notice a peppery taste or a tingle. Then stop and park the gum between your cheek and gum. When the tingle fades after a minute or so, chew again briefly and park it somewhere else. Keep that up for about 30 minutes, then discard the piece. Chewing continuously releases the nicotine too fast for your mouth to absorb, so you swallow it and get a sore throat and a churning stomach instead of relief.
2mg or 4mg?
The rule of thumb: 4mg if you smoked 20 or more a day, or your first cigarette used to come within 30 minutes of waking; 2mg for lighter smokers. Under-dosing is the commoner mistake. If a piece of 2mg leaves the craving untouched, move to 4mg rather than chewing two. Nicorette Icy White 4mg and 2mg are the classic mint; Nicotinell fruit suits anyone who can't face menthol. The full gum range has both strengths in most flavours.
How many pieces a day, and for how long?
Use a piece whenever you'd have smoked, typically 8 to 12 a day, never more than 15. Don't ration it in the first weeks; under-use is why gum "fails". Keep going at full use for about three months, then cut down gradually over the next few months, and stop when you're down to one or two a day. Most people are finished within six months, and a year is the guideline maximum. Avoid coffee, fruit juice and fizzy drinks for 15 minutes before a piece; acidic drinks stop the nicotine absorbing.
Gum with a patch: the combination that works best
The strongest evidence is for a nicotine patch for the steady background plus gum for the sudden cravings, which roughly doubles quit rates over either alone and is how NHS stop-smoking services prescribe. Our guide to choosing NRT walks through the pairing.
Is nicotine gum bad for you?
Not compared with the thing it replaces. Nicotine is addictive but it isn't what causes cancer, heart disease or lung damage; the tar and carbon monoxide in smoke do that. Nicotine gum does not cause cancer. Side effects are mostly technique: hiccups, heartburn, a sore throat and an aching jaw all mean you're chewing too fast or too much. It can stick to dentures and fillings, and it's sugar-free, so it isn't bad for your teeth in the way sweets are. A minority of people carry on using gum for years; that's a much smaller problem than smoking, and the taper above avoids it. Ask our pharmacist first if you're pregnant, under 18, have had a recent heart attack or stroke, or take medicines whose dose changes when you stop smoking.
Nicotine gum side effects, and how to avoid them
Almost every side effect of nicotine gum is a technique problem. Hiccups, heartburn and a churning stomach mean you're chewing continuously and swallowing the nicotine; slow down and park it. A sore throat or mouth ulcers come from the same thing, plus parking the gum in the same spot every time; move it around. Jaw ache is from too many pieces in too short a time or chewing too hard; the gum is firmer than ordinary gum by design. Headache, dizziness or a racing heart mean the dose is too high for you, usually 4mg when 2mg would do, or gum on top of a patch that's already at the top strength. Drop a strength or a piece, and if it persists, check with a pharmacist. Sticking to dentures and fillings: switch to a lozenge, which does the same job without chewing.
Can you get addicted to nicotine gum?
It's possible, and it's much less of a problem than it sounds. Around one in ten long-term quitters keep using gum beyond a year. Gum delivers nicotine slowly and at a lower level than cigarettes, so the dependence is milder and the harm is a fraction of smoking's: no tar, no carbon monoxide, no lung damage. The taper stops it becoming a habit: three months at full use, then one piece fewer a day each week or so, then swapping some pieces for ordinary sugar-free gum, then stopping. If you find you're still on gum after a year, that's a conversation with a pharmacist, not a reason to go back to smoking.
Cutting down before you stop
If a fixed quit date feels impossible, the licensed alternative is cut down to stop: use gum in place of some cigarettes, aiming to halve your smoking within six weeks and stop completely within six months, with a quit date set once you're down to a handful a day. It works for people who've failed at abrupt quitting, as long as the trajectory is downward. Smoking and chewing at the same moment isn't dangerous but it does make you feel sick, which some people use as a deterrent.
A typical day on nicotine gum
For a 20-a-day smoker on 4mg: a piece on waking (with a patch applied at the same time if you're combining), then one at each point you'd normally have smoked, the coffee break, after lunch, the drive home, after dinner, roughly one an hour through the day, 8 to 12 pieces in total and never more than 15. Keep the pack where the cigarettes used to be. By week three most people are on 6 to 8 pieces without trying; that's the taper starting on its own.
Who should check with a pharmacist first
Anyone pregnant or breastfeeding (NRT is far safer than smoking, but the form and dose are worth discussing), under 18, with a recent heart attack or stroke, very uncontrolled blood pressure, a stomach ulcer or jaw problems, diabetes (nicotine can affect blood sugar control), or on medicines whose dose changes when smoking stops, such as clozapine, theophylline, warfarin and some antidepressants. Our pharmacist can answer all of these.
Frequently asked questions
Can I use nicotine gum while still smoking?
Cutting down with gum before a full quit is a recognised approach, as long as a quit date follows. Smoking and chewing at the same moment will make you feel sick.
Why does it burn my throat?
You're chewing too fast and swallowing the nicotine. Slow down, park it, and it stops.
Is gum better than lozenges or spray?
Same job, different form. Lozenges are discreet and suit dental work; the mouth spray is fastest. Gum gives your mouth and hands something to do, which many ex-smokers value most.
How long does one piece last?
About 30 minutes of chew-and-park, then discard it. Chewing a piece for an hour doesn't give you more nicotine; it's spent.