This is not cardiac advice. If you have any heart condition, experience persistent palpitations, chest discomfort or awareness of irregular heartbeats, speak to your GP before continuing to vape. Call 999 for severe chest pain, pain radiating to arm or jaw, pain with sweating or dizziness or any symptom suggesting a possible heart attack. This article provides general consumer information only.

How nicotine affects the heart

Three mechanisms together explain the heart rate effect of vaping:

1. Adrenaline release. Nicotine stimulates the adrenal glands to release adrenaline (epinephrine). Adrenaline is the fight-or-flight hormone that raises heart rate, opens airways plus mobilises energy reserves. Each vape hit triggers a short burst of adrenaline which is why many users describe a slight rush or alertness during sessions.

2. Direct cardiac stimulation. Nicotine also acts directly on receptors in the heart muscle plus in the nervous system's control of heart rate. This adds to the adrenaline effect and produces a more immediate rise in beats per minute.

3. Vasoconstriction and blood pressure. Nicotine narrows blood vessels which raises blood pressure. The heart works harder to pump blood through narrower vessels which can add to heart rate changes plus create the general cardiovascular effect of nicotine.

How much does it actually rise

Published research typically shows increases of 7 to 15 beats per minute during and immediately after a vape session. The exact amount varies by several factors:

• Nicotine strength. 20mg nic salt produces larger effects than 10mg or 5mg. Stepping down reduces the cardiovascular impact.
• Session intensity. Chain vaping or deeper inhaling increases nicotine delivery per session and therefore heart rate effects.
• Individual sensitivity. Some people are more nicotine-sensitive than others and experience larger effects.
• Recent activity. Vaping immediately after exercise, coffee or stress produces larger combined effects than vaping at baseline rest.
• Frequency and tolerance. Regular vapers often show smaller heart rate responses per session than occasional users due to tolerance.

Heart rate typically returns to baseline within 20 to 30 minutes after the last puff.

Is this dangerous for healthy adults?

For healthy adults without existing heart conditions the typical increase is within the same range produced by mild exercise, a strong coffee or moderate emotional stress. The body is designed to handle these variations comfortably. Published research has not shown meaningful short-term cardiac risk from typical vape use in healthy adults.

The picture for long-term use is still developing. Chronic nicotine exposure has known cardiovascular effects in smokers but the vape-specific long-term evidence base is thinner. Switching from smoking to vaping substantially reduces cardiovascular risk because combustion by-products are the main driver of smoking-related heart disease plus these are absent in vaping. Stopping both is the cleanest cardiovascular outcome.

Existing heart conditions

The picture changes meaningfully for people with pre-existing cardiovascular conditions:

• Arrhythmias. Nicotine-driven heart rate changes can trigger or worsen arrhythmia in susceptible individuals. Speak to your cardiologist before vaping.
• Coronary artery disease. Vasoconstriction plus increased cardiac demand are problematic when coronary arteries are already narrowed. GP discussion essential.
• Heart failure. Additional cardiac stress is generally undesirable. Cardiologist guidance needed.
• Hypertension. Nicotine raises blood pressure. For anyone with uncontrolled high blood pressure, nicotine adds to an existing issue.
• Recent cardiac events. After any heart attack, heart surgery or cardiac event, resuming any nicotine use should be discussed with the cardiology team.

For smokers with heart conditions specifically, switching from smoking to vaping often reduces cardiovascular risk overall even though nicotine-specific effects remain. The combustion by-products that drive most smoking-related heart disease are removed. NHS Stop Smoking services can provide personalised guidance that factors in your specific condition.

Vaping and exercise

Combining nicotine with exercise produces a compound cardiovascular effect. Your heart rate rises from exercise plus from nicotine at the same time. For healthy adults this is generally safe but:

• Avoid vaping immediately before high-intensity exercise especially if you have any cardiovascular symptoms at rest.
• Space vape sessions away from training sessions if possible.
• Hydration matters more because both exercise and vaping contribute to dehydration.
• If you notice unusual heart rate responses during exercise plus vape, speak to your GP.

When to see a GP or call 999

Call 999 or go to A&E for:

• Severe chest pain.
• Chest pain radiating to arm, jaw or back.
• Chest pain with sweating, dizziness or nausea.
• Fainting or collapse.
• Severe shortness of breath at rest.
• Any symptom suggesting a possible heart attack.

Book a GP appointment for:

• Persistent palpitations or awareness of irregular heartbeats.
• Chest discomfort during or after vaping that is not severe.
• Any new cardiovascular symptom.
• If you have an existing heart condition and want to discuss vape use.

Practical steps for heart-conscious vapers

• Step down nicotine strength over time to reduce cumulative cardiovascular load.
• Space out vape sessions rather than chain vaping.
• Stay well hydrated throughout the day.
• Regular cardiovascular fitness supports overall heart health.
• Annual health checks can pick up blood pressure or rhythm changes early.
• Discuss vape use with your GP at regular appointments so it is part of your medical record.

If you are stepping down nicotine strength, our nicotine salts collection covers every UK compliant strength from 20mg down to 3mg.