How Long After Quitting Smoking Will My Palpitations Stop?

Most palpitations caused directly by smoking fade within the first few days to weeks after quitting. Heart rate drops sharply within 24 hours of your last cigarette, and the nervous system’s ability to regulate rhythm steadily improves over the following weeks. But the experience is rarely as clean as a single countdown timer, because nicotine withdrawal itself can temporarily make your heart feel irregular, and quitting aids like nicotine patches or gum introduce their own wrinkles.

Why Smoking Makes Your Heart Race

Nicotine is a stimulant that activates the sympathetic nervous system, the branch responsible for your fight-or-flight response. Each dose of nicotine pushes your heart rate up by roughly 7 beats per minute and raises your blood pressure, while also boosting nerve signals that keep the cardiovascular system on alert.¹ These effects happen whether you inhale the nicotine through a traditional cigarette or an e-cigarette.²

When you smoke regularly, this stimulation becomes chronic. Your resting heart rate sits higher than it otherwise would, and the balance between the “accelerator” and “brake” sides of your autonomic nervous system tilts in favor of the accelerator. Research on people who smoke or drink heavily has shown that this ongoing sympathetic dominance suppresses the calming parasympathetic branch, which in turn raises the risk of irregular heart rhythms.³ The palpitations you feel are a downstream consequence of that imbalance: your heart is being prodded into beating faster, harder, or more erratically than it needs to, dose after dose, day after day.

Carbon monoxide from cigarette smoke adds another layer. It displaces oxygen on your red blood cells, forcing your heart to pump harder to deliver the same amount of oxygen to tissues. That extra workload clears quickly once you stop, though. Carbon monoxide and the related blood marker carboxyhemoglobin drop back toward normal within just 12 hours of your last cigarette.⁴

What Happens in the First Days and Weeks

The most dramatic change comes within 24 hours. In one study following smokers through their first year of abstinence, heart rate dropped by about 9 beats per minute on the very first day, falling from an average of roughly 74 to 65 beats per minute.⁵ A separate study found a similar initial drop of about 8 beats per minute on day one.⁶ That rapid slowdown reflects the removal of nicotine’s constant stimulant push.

Heart rate variability, which is essentially a measure of how flexibly your heart adjusts its rhythm beat to beat, also begins to recover almost immediately. Within a day of quitting, several measures of variability rise. The improvement peaks somewhere between two and seven days after cessation, then gradually settles to a new normal that remains better than it was while you were smoking, at least through the first month.⁷ Higher variability is a good sign: it means the parasympathetic “brake” side of your nervous system is regaining influence, which helps prevent the erratic beats that register as palpitations.

For many people, palpitations linked to smoking resolve within this initial window. Your heart is no longer being chronically stimulated by nicotine, the carbon monoxide burden has cleared, and the autonomic nervous system is recalibrating. If you were a moderate smoker without underlying heart disease, this is often the full story.

The Weeks That Follow Can Feel Confusing

Here is where things get a bit less tidy. Although the day-one drop in heart rate is consistent across studies, what happens over the next several weeks varies. The year-long follow-up study found that heart rate stayed stably low: at 12 months, the average was still about 66 beats per minute, barely above the day-one reading and well below the smoking-era baseline.⁵ The researchers interpreted this as a permanent return to what your heart rate should be without nicotine in the picture.

But the other study, tracking subjects for 60 days, noticed something different: after the initial drop, heart rate gradually drifted back up, returning fully to the pre-quit baseline by around day 60.⁶ That study’s authors attributed this partial rebound to the physiological effects of nicotine withdrawal. The difference between these two patterns likely reflects individual variation, the intensity of withdrawal, and differences in how long each person had been smoking. The reassuring point is that neither group experienced a sustained increase in heart rate above their smoking-era level. You may feel your pulse fluctuate in the first couple of months, but it should not climb higher than it was when you were smoking.

If you do notice palpitations flaring during weeks two through six or so, withdrawal is the most likely culprit. Your body spent years adapting to regular hits of a stimulant, and removing that stimulant throws off the autonomic balance temporarily. Anxiety, sleep disruption, and heightened stress responses during withdrawal all feed into a cardiovascular system that is adjusting on the fly. Research on the overlap between nicotine withdrawal and panic-like symptoms found that people experiencing stronger withdrawal tended to have more intense physical stress responses, including heart-related symptoms.⁸

Nicotine Replacement Therapy Can Be Its Own Source

If you are using nicotine patches, gum, lozenges, or other nicotine replacement products to help you quit, there is an irony worth knowing: these products can themselves cause palpitations. A large meta-analysis pooling data from over 170,000 individuals found that nicotine replacement therapy was associated with about double the odds of experiencing heart palpitations and chest pain compared to placebo.⁹ That sounds alarming, but context matters: the absolute risk is still low for most people, and the palpitations typically resolve once you taper off the replacement product.

Studies looking specifically at nicotine patches tell a somewhat more reassuring story. In healthy smokers who switched to patches, heart rate and blood pressure actually dropped relative to their smoking baseline, and ambulatory heart monitoring showed no increase in the frequency of abnormal atrial or ventricular beats.¹⁰ Even in patients with existing coronary artery disease, patches did not worsen arrhythmias or heart rhythm disturbances compared to placebo.¹¹

The takeaway is nuanced. Nicotine replacement delivers far less nicotine than cigarettes and does so without the combustion byproducts that damage blood vessels. Still, the nicotine itself can cause the subjective sensation of palpitations in some people, particularly at higher doses or when combined with caffeine or stress. If palpitations are your main concern, know that they may persist or even briefly intensify while you are on the patch, but should resolve once you complete the tapering schedule. The cardiovascular benefit of quitting far outweighs the temporary stimulant effect of NRT.

Prescription Cessation Medications

Two other commonly prescribed cessation drugs, bupropion and varenicline, work differently from nicotine replacement and carry their own cardiovascular considerations. Bupropion is an amphetamine-related compound that can modestly raise heart rate and blood pressure. Varenicline is more selective in how it binds to the brain’s nicotine receptors and has less expected direct cardiovascular impact, though researchers have looked carefully at whether it affects blood vessel function through a different mechanism.¹² In clinical trials, serious cardiovascular events were rare with all three approaches. If palpitations are especially bothersome while using one medication, your doctor can often switch you to another without losing ground on your quit attempt.

E-Cigarettes Are Not a Free Pass

Some people switch to e-cigarettes thinking they will sidestep the heart issues. E-cigarettes do eliminate combustion and the carbon monoxide exposure that comes with it, but they still deliver nicotine, which means the same sympathetic nervous system stimulation that causes palpitations remains in play.² Data from the Health eHeart Study found that e-cigarette-only users were more likely to report palpitations, chest pain, and arrhythmia compared to people who used neither product.¹³ If your goal is to stop palpitations, switching to vaping rather than quitting nicotine altogether is unlikely to get you there.

Factors That Can Delay Recovery

Several things can make palpitations linger longer than the typical days-to-weeks window, and they are worth knowing about so you do not assume something is wrong with your heart when the real issue is elsewhere.

Caffeine: Many ex-smokers find they are suddenly more sensitive to caffeine. Nicotine speeds up the metabolism of caffeine, so the same two cups of coffee that felt fine while you were smoking can hit much harder once you quit. That extra caffeine jolt can keep your heart rate elevated and make palpitations persist.
Anxiety and stress: Nicotine withdrawal is inherently anxiety-provoking, and anxiety is one of the most common non-cardiac causes of palpitations. If you have a preexisting anxiety or panic disorder, withdrawal can amplify those symptoms, producing more noticeable heart sensations that may last until the withdrawal period passes.⁸
Alcohol: Heavy drinking shifts the autonomic nervous system in the same sympathetic-dominant direction as smoking.³ If you drink regularly, quitting smoking may not be enough on its own to fully restore the autonomic balance that keeps your heartbeat steady.
How long and how much you smoked: Decades of smoking cause structural damage to blood vessels and prolonged autonomic disruption. Recovery in long-term heavy smokers tends to be slower than in lighter or shorter-duration smokers, though the direction of improvement is the same.

Longer-Term Cardiovascular Healing

The palpitation question sits inside a broader story of cardiovascular recovery that unfolds over months to years. While heart rate and rhythm tend to normalize within weeks, other measures of cardiovascular health take longer. Vascular function, specifically the ability of blood vessels to dilate properly and the stiffness of arterial walls, shows clear improvement by three months in people who quit completely, with further gains at 12 months.¹⁴ Markers of inflammation and oxidative stress also improve within the first couple of months after quitting.¹⁵

This matters for palpitations because inflamed, stiff blood vessels force the heart to work harder, and chronic inflammation can itself promote electrical instability. The ongoing improvement in vascular health over months means that even if your palpitations resolve early, the underlying cardiovascular system continues getting healthier in ways that reduce the chance they will return. People who quit completely see these benefits; those who cut back but keep smoking do not, and their vascular function may actually worsen over the same period.¹⁴

Heart rate variability, a marker of how well the nervous system governs your heart rhythm, also continues to improve. Studies comparing people who successfully quit with those who relapsed found that the quitters had substantially better variability measures at follow-up, reflecting healthier autonomic control of the heart.¹⁶

When Palpitations Warrant Medical Attention

Most palpitations during and after quitting are benign: your heart is adjusting, your nervous system is recalibrating, and the sensations pass. But palpitations are also a symptom of conditions that have nothing to do with smoking, including thyroid disorders, anemia, structural heart problems, and certain arrhythmias that need treatment. Quitting smoking does not make you immune to these, and a common mistake is to assume that every heart sensation during this period is just “withdrawal.”

You should get checked if palpitations are accompanied by dizziness, fainting, unusual fatigue, or chest pain, as these combinations can signal a more serious arrhythmia or cardiac issue that needs prompt evaluation.¹⁷ Palpitations that consistently last more than a few seconds at a time, that wake you from sleep, or that are still occurring unchanged many weeks after quitting also deserve medical attention. A straightforward ECG or a short period of heart monitoring can rule out anything structural or electrical and save you a lot of worry.

It is also worth mentioning to your doctor if you are on nicotine replacement or a cessation medication at the time. As noted, these products can contribute their own cardiovascular effects, and adjusting the dose or switching formulations may resolve the issue without abandoning your quit. The worst outcome is returning to smoking because you misinterpret a medication side effect as evidence that quitting itself is hurting your heart.