what does nicotine do to your body
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What Does Nicotine Do to Your Body?
It raises heart rate and blood pressure and narrows blood vessels, and is addictive. But it is not the main cause of smoking harm.
Beyond its effect on the brain, people often ask what nicotine does to the body. As a stimulant, nicotine raises your heart rate and blood pressure and narrows blood vessels, and it is addictive. It is not, however, the main cause of the serious harm from smoking, which comes from the tar and toxins in smoke. This guide explains, alongside our guide on what nicotine does overall.
Quick answer
As a stimulant, nicotine raises your heart rate and blood pressure and narrows blood vessels, and it is addictive. It is not the main cause of smokings serious harm, which comes from tar and toxins, but it is not suitable for non smokers, under 18s, pregnant women or, without advice, people with some heart conditions.
Nicotine''s effects on the body
Nicotine is a stimulant, so its main bodily effects are to raise your heart rate and blood pressure and to narrow blood vessels. These are short term stimulant effects that come with each dose. Over time, the most significant effect is addiction, as the body adapts to having nicotine and craves it when levels drop, producing withdrawal between doses.
Nicotine and the body
| Effect | Detail |
|---|---|
| Heart rate | Raised |
| Blood pressure | Raised |
| Blood vessels | Narrowed |
| Addiction | The body adapts and craves it |
| Main smoking harm? | No, that is tar and toxins |
Not the main cause of smoking harm
It is important to keep nicotine in perspective. While it affects the body and is addictive, it is not the main cause of the serious diseases linked to smoking, those come overwhelmingly from the tar and toxic chemicals produced by burning tobacco. This is why a cleaner nicotine source, like a vape, is far less harmful than smoking, though nicotine is still not for everyone.
Nicotine raises heart rate and blood pressure and narrows blood vessels, and it is addictive. But it is not the main cause of smoking''s serious harm, which comes from tar and toxins.
Myths and facts
| Myth | The reality |
|---|---|
| Nicotine causes most smoking related disease | The serious harm comes mainly from tar and toxins, not nicotine. |
| Nicotine has no effect on the body | As a stimulant it raises heart rate and blood pressure and narrows blood vessels. |
| Nicotine is fine for anyone | It is not for non smokers, under 18s, pregnant women or, without advice, some heart conditions. |
| Nicotine and tar are the same | Nicotine is the addictive part; tar and toxins cause most of the harm. |
Frequently asked questions
What does nicotine do to your body?
As a stimulant it raises your heart rate and blood pressure and narrows blood vessels, and over time it causes addiction.
Is nicotine what makes smoking dangerous?
No, the serious harm from smoking comes mainly from tar and toxins; nicotine is the addictive part.
Does nicotine affect the heart?
It raises heart rate and blood pressure, so people with some heart conditions should seek medical advice.
Who should avoid nicotine?
Non smokers, under 18s, pregnant women, and, without advice, people with certain heart conditions.
Why is vaping less harmful if it contains nicotine?
Because it delivers nicotine without the tar and toxins of smoke, which cause most of smokings harm.
The bottom line
As a stimulant, nicotine raises your heart rate and blood pressure and narrows your blood vessels, and over time its most significant effect is addiction, as the body adapts and craves it. But nicotine is not the main cause of the serious harm from smoking, which comes overwhelmingly from the tar and toxins in smoke. That is why a cleaner nicotine source is far less harmful than smoking, though nicotine is still not suitable for non smokers, under 18s, pregnant women or, without advice, some heart conditions.
More help and related reading
If this guide raised other questions, the Help and Guidance library has plain English answers to many more. The closely related pages below are worth a look, and you can always return to the main hub to browse every topic we cover. If you are unsure about a product, rule or your travel plans, checking the official guidance is always wise.
- What does nicotine do?
- Is nicotine bad for you?
- Is nicotine a stimulant?
- Browse the full Help and Guidance library
Key things to remember
- Raises heart rate and blood pressure
- Narrows blood vessels
- Is addictive over time
- Not the main cause of smoking harm
- Not for some groups, including pregnancy
Short term effects versus long term addiction
It helps to separate nicotines short term effects from its longer term one. In the short term, each dose acts as a stimulant, nudging up heart rate and blood pressure and narrowing blood vessels. Over the longer term, the defining effect is addiction, as the body adapts to expect nicotine and produces withdrawal symptoms when it is absent.
It helps to keep nicotine in perspective. It is the substance that makes smoking and vaping habit forming, but it is the tar and many toxic chemicals in tobacco smoke, not the nicotine, that cause most of the serious harm from smoking. This is why replacing cigarettes with a cleaner source of nicotine reduces harm so substantially.
Short term versus long term
| Timeframe | Effect |
|---|---|
| Each dose | Raised heart rate and blood pressure |
| Each dose | Narrowed blood vessels |
| Over time | Addiction |
| Between doses | Withdrawal |
| Main smoking harm | Tar and toxins, not nicotine |
A few more questions
Can nicotine raise blood pressure?
Yes, as a stimulant it can raise heart rate and blood pressure; people with heart conditions should seek medical advice.
Do and don’t
Do
- Keep nicotine in perspective: it is for adult smokers and vapers
- Remember it is addictive
- Separate the nicotine from the smokes harm
- Seek free support if you want to cut down or stop
Try not to
- Start using nicotine if you are a non smoker
- Assume it is harmless because it is not the main harm
- Treat it as a health product
- Ignore that it is not for under 18s or pregnant women
Who should be especially careful
Some groups should be especially careful with nicotine because of its effects on the body. It is not suitable for non smokers, for anyone under 18, or for pregnant women, where it can affect the developing baby. People with certain heart conditions may also be advised to be cautious, given that nicotine raises heart rate and blood pressure, so medical advice matters there.
For an adult smoker, the harm reduction picture still holds, a cleaner source of nicotine is far less harmful than continuing to smoke. But that is about reducing harm relative to smoking, not a sign that nicotine has no effect on the body at all.
Caution groups
| Group | Guidance |
|---|---|
| Under 18s | Should not use nicotine |
| Non smokers | Advised not to start |
| Pregnant women | Should avoid; can affect the baby |
| Certain heart conditions | Seek medical advice |
| Adult smokers | A cleaner source reduces harm |
More questions answered
Does nicotine harm your heart?
It raises heart rate and blood pressure; people with heart conditions should seek medical advice before using nicotine products.
How long does nicotine stay in your body?
Nicotine itself clears over roughly a day, while its by product cotinine can be detected for longer; this varies between people.
A couple more questions
Does nicotine affect sleep?
As a stimulant, nicotine can disrupt sleep for some people, especially when used close to bedtime.
Can nicotine affect circulation?
It narrows blood vessels, which can affect circulation; people with relevant conditions should seek medical advice.
Why is nicotine not the main smoking harm?
Because the tar and toxic chemicals from burning tobacco cause most of the serious disease, not the nicotine itself.
A quick word on safety and the law
Vaping and nicotine products are intended for adult smokers and existing vapers as a less harmful alternative to cigarettes. They contain nicotine unless stated otherwise, which is addictive, and they are not suitable for non smokers, pregnant women or anyone under 18. By law you must be 18 or over to buy vaping products in the UK, and we age verify every order. If you want to stop using nicotine altogether, your local stop smoking service offers free, tailored support.
UK public health bodies advise that vaping is substantially less harmful than smoking, but it is not risk free, and if you do not smoke the advice is not to start.
This guide is general information, not personal medical advice. If you have specific health concerns, please speak to a GP or pharmacist.
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