Smoking and Blood Pressure: How Cigarettes Raise Your Risk

Smoking raises blood pressure with every cigarette, but the long-term relationship is more complicated than most articles admit — and what happens to blood pressure after quitting is not the simple fall you may have read about. This matters if you are watching your blood pressure while you quit.

Acute Blood Pressure Effect

Nicotine releases adrenaline-type hormones, increases heart rate, constricts blood vessels in the skin and heart, and "transiently increases blood pressure", according to a leading pharmacology review. So each cigarette pushes blood pressure up for a while. See nicotine's broader cardiovascular effects.

We could not trace the precise figures often quoted for how much and for how long each cigarette raises it, so we don't repeat them.

Chronic Effects: Does Smoking Cause Hypertension?

This is where the data is genuinely mixed. In a survey of nearly 34,000 adults in England, any independent long-term effect of smoking on blood pressure was small: older male smokers had higher systolic pressure, but younger men and women did not, and light smokers had slightly lower pressure than non-smokers.

That does not make smoking safe for your arteries. Smoking damages blood vessels and drives heart disease and stroke through several routes besides blood pressure — the 2020 Surgeon General's report describes quitting as lowering markers of inflammation and of the blood's tendency to clot. Heart disease and stroke account for about 39% of the premature deaths smoking causes in the US. If you have high blood pressure, smoking adds a second major risk on top of it; see also smoking and diabetes.

Blood Pressure Medications and Smoking

Tobacco smoke speeds up how fast the liver clears some medicines, and once you stop, doses of some drugs may need lowering. If you take any regular medicine, including for blood pressure, tell your doctor or pharmacist you are quitting and keep taking it as prescribed.

Secondhand Smoke and Blood Pressure

The CDC says secondhand smoke interferes with the normal functioning of the heart, blood and vascular systems and raises non-smokers' risk of coronary heart disease by 25–30% and of stroke by 20–30%. See secondhand smoke effects.

What Happens to Blood Pressure After Quitting

Minutes: WHO says heart rate and blood pressure drop within 20 minutes of the last cigarette — the end of the short-term push.

Months to years: This is where the popular timelines get it wrong. Resting blood pressure does not reliably fall after quitting, and it can rise, largely because of weight gain:

In a Swedish study following 3,931 women for about nine years, those who quit gained more weight and had a higher rate of new high blood pressure than those who kept smoking
In a 12-week study of people stopping nicotine pouches and snus, systolic home blood pressure rose by about 3.7 mmHg, tracking weight gain

Why quitting still wins: the heart benefit of quitting does not depend on blood pressure falling. In the Framingham study, recent quitters had about half the cardiovascular risk of people who kept smoking, and weight gain did not change that. Excess coronary heart disease risk halves somewhere between one year (NHS, WHO) and three to six years (CDC).

What to do: keep checking your blood pressure after you quit, keep taking any prescribed medicine, and pay attention to weight after quitting.

Nicotine Replacement and Blood Pressure

NRT (patches, gum, lozenges) gives nicotine without carbon monoxide or the smoke's other chemicals. The pharmacology review notes that clinical trials of nicotine patches in smokers with cardiovascular disease showed no increased risk of cardiovascular events compared with placebo.

For people with high blood pressure who are trying to quit, NRT is far safer than continued smoking. If your blood pressure is very high or poorly controlled, or you have had a recent heart attack or stroke, talk to your GP before choosing a product.

FAQ

Does smoking cause high blood pressure?

Each cigarette raises blood pressure briefly. Over the long term, a large English survey found any independent effect small — but smoking still damages blood vessels and raises heart disease and stroke risk through other routes. If you already have high blood pressure, smoking adds a second major risk.

Does quitting smoking lower blood pressure?

The short-term push from each cigarette stops within minutes. Resting blood pressure over the following months may not fall, and in some studies rose, mostly with weight gain. Quitting still roughly halves cardiovascular risk over the following years, so keep checking your blood pressure and keep taking any prescribed medicine.

Is nicotine replacement safe if I have high blood pressure?

For most people, yes — trials of nicotine patches in smokers with heart disease found no increase in cardiovascular events, and NRT has none of smoke's carbon monoxide. If your blood pressure is severe or poorly controlled, discuss NRT with your doctor first.