How Much Does Adderall Raise Your Heart Rate?

About 10 beats per minute after a first dose, and about 4 beats per minute on average with daily use. In a Mayo Clinic trial, one 25 mg dose of Adderall raised resting heart rate by 10 beats per minute and the top blood pressure number by 10 points in healthy young adults. In trials of people who take amphetamines every day, the average rise is smaller but lasts as long as the drug is taken.

Adderall is a mix of amphetamine salts. It treats ADHD (attention-deficit/hyperactivity disorder), and many people also take it without a prescription to study or work longer. The heart-rate question has two answers: what happens the first time, and what happens over months and years.

What the Data Show

The page’s original study is a randomized, double-blind, placebo-controlled trial at the Mayo Clinic. The trial enrolled 30 healthy adults without ADHD who had never taken Adderall, and each was tested on two separate days. On one visit they swallowed 25 mg of generic Adderall, and on the other an identical placebo. Twenty-nine finished both visits (16 women, average age 27). Three hours after the Adderall dose, at rest, heart rate rose by 10 beats per minute. Systolic blood pressure (the top number) rose from 116 to 126 mm Hg, and diastolic pressure (the bottom number) rose by 6 mm Hg. Blood norepinephrine, a stress hormone, rose from 215 to 301 pg/mL. Nothing changed on the placebo day. The authors called the rises “striking.”

Daily use looks different. A Cochrane review of 56 randomized trials with 10,583 people found that daily oral amphetamines raised heart rate by 3.71 beats per minute and systolic pressure by 1.93 mm Hg compared with placebo. The effect was the same in trials lasting 8 weeks or longer, so it does not fade as the body gets used to the drug. People on amphetamines were also more likely to quit the trial because of side effects: 4.3% more of them dropped out over about a month.

A meta-analysis of 10 trials in adults with ADHD found that stimulants raised resting heart rate by 5.7 beats per minute and systolic pressure by 2.0 mm Hg.

Why is the first dose so much bigger? The Mayo volunteers had never taken the drug and got 25 mg all at once, while prescribed doses are usually raised step by step.

Why Does Adderall Increase Heart Rate?

Amphetamine makes nerve endings release norepinephrine and dopamine. Norepinephrine is the main messenger of the sympathetic nervous system, the “fight or flight” system. It tells the heart to beat faster and squeezes blood vessels, which raises blood pressure.

The Mayo trial measured this directly: blood norepinephrine climbed about 40% after one dose, which the authors described as sympathetic activation. A review of 57 heart rate and blood pressure studies in people with ADHD found that stimulants raised heart rate and blood pressure along with other signs of arousal, such as sweatier skin and wider pupils.

What Is a Normal Heart Rate on Adderall?

A normal resting heart rate for adults is 60 to 100 beats per minute. A resting rate above 100 is called tachycardia. Because Adderall adds roughly 4 to 10 beats, most people with a resting rate in the 60s or 70s stay in the normal range.

Some people go higher. In the adult stimulant meta-analysis, 4.2% of people on a stimulant had a resting heart rate above 90, compared with 1.7% on placebo. That is about 1 extra person in 40.

A heart rate of 120 at rest is not a typical Adderall effect. It points to too high a dose, too much caffeine on top, dehydration, anxiety, a thyroid problem, or a rhythm problem, and it is worth getting checked.

Can Adderall Cause a Heart Attack?

For people taking it as prescribed, large studies have not found a clear increase in heart attacks. The absolute risk in young people is very low.

A study of 443,198 adults aged 25 to 64 compared people currently taking ADHD medicines, including amphetamine, with past users and nonusers. Current use was not linked to more heart attacks, sudden cardiac deaths or strokes. Even at the edge of what the data allowed, the extra risk would be about 0.19 events per 1,000 people per year at ages 25 to 44.

A study of 1.2 million children and young adults aged 2 to 24 found 3.1 serious heart events per 100,000 person-years, and current users of ADHD drugs were not at higher risk. The authors noted that a doubling of risk could not be ruled out, but that the absolute risk would still be low. A meta-analysis of 19 studies with 3.9 million people found no statistically significant link between ADHD medicines and heart attack, stroke or heart disease overall, though a modest increase, especially in cardiac arrest and fast heart rhythms, could not be ruled out.

All of these studies looked at people with prescriptions who were screened and followed by a doctor. None studied misuse. People who take borrowed pills often take larger doses, crush or snort them, or mix them with alcohol or energy drinks. In the US, nonmedical use of dextroamphetamine-amphetamine in adults rose 67.1% and related emergency room visits rose 155.9% between 2006 and 2011, and the main source of the pills was a friend or relative.

Is Adderall Bad for Your Heart Long Term?

The long-term data point to blood pressure. A Swedish study of 278,027 people with ADHD followed medication use for up to 14 years. Compared with no use, 3 to 5 years of ADHD medicine was linked to about 27% higher odds of cardiovascular disease, and more than 5 years to about 23% higher odds. More than 5 years of use was also linked to about 80% higher odds of high blood pressure.

Each extra year of use carried about 4% higher odds. The rise was steepest in the first 3 years and then leveled off. This was an observational study of all ADHD medicines, not Adderall alone, so it shows a link, not proof that the drug caused the disease. Still, it fits the trial data: a small rise in blood pressure, held for years, adds up.

Can Adderall Cause Tachycardia or SVT?

A faster normal heartbeat, called sinus tachycardia, is an expected effect of the drug. Abnormal rhythms are a separate question.

A South Korean study of 1,224 children and teens found about 61% higher rates of arrhythmia (abnormal heart rhythm) diagnoses during periods of treatment with methylphenidate, a different stimulant, with the highest risk in children born with heart disease. The authors said the absolute risk was likely low. The pooled analysis above found a trend toward more cardiac arrest and arrhythmias that did not reach statistical significance.

No study I found reports SVT (supraventricular tachycardia, a sudden racing rhythm that starts above the heart’s lower chambers) rates on Adderall specifically. Palpitations that start and stop suddenly, a rate that stays above 150 at rest, chest pain, or fainting need prompt medical care.

Does Adderall Affect HRV?

Probably, through its effect on heart rate, but it has not been measured well. HRV (heart rate variability) is the small beat-to-beat change in timing between heartbeats. It tends to drop when the fight-or-flight system is turned up and heart rate rises.

I found no study that measured HRV on Adderall. A meta-analysis of methylphenidate in children with ADHD found no significant change in resting HRV, though the certainty of the evidence was very low. If your watch shows a lower HRV on days you take Adderall, that fits a higher heart rate and more sympathetic drive. It is not, by itself, a sign of heart damage.

How Can You Lower Your Heart Rate on Adderall?

No trial has tested specific ways to bring heart rate down while taking Adderall. The sensible levers are the ones that add to the same stress on the heart: caffeine and energy drinks, dehydration, poor sleep, and doses taken late in the day.

Dose and drug choice belong with the prescriber. In the network meta-analysis, every ADHD drug raised heart rate or blood pressure except guanfacine, which lowered pulse in adults by about 7 beats per minute. Stimulants did not raise heart rate or blood pressure more than the non-stimulants atomoxetine or viloxazine did.

Dr. Kumar’s Take

The numbers in the trials are modest for most people: a few beats per minute and a couple of points of blood pressure. The Mayo trial shows what a first, large, unsupervised dose does, and that is a different picture: 10 beats and 10 points in healthy 27-year-olds sitting still. Add a heart condition nobody knew about, an energy drink, or a hard workout, and the margin shrinks.

For people with ADHD who take it as prescribed, the large studies are reassuring about heart attacks in the short run. The long-term signal is blood pressure creeping up over years. That is easy to track with a home cuff, and it is the number I would want watched.

Practical Takeaways

Expect a few extra beats. Daily amphetamine use raises resting heart rate by about 4 beats per minute on average; a first large dose can add about 10.
Know your baseline. Check your resting heart rate and blood pressure before starting and again after a few weeks on a steady dose.
Watch blood pressure over years, since that is where the long-term risk shows up.
Cut back on caffeine and energy drinks, which push the same fight-or-flight system.
Never take someone else’s pills. The reassuring heart studies are all in screened, prescribed patients.
Get checked right away for chest pain, fainting, shortness of breath, or a racing heartbeat that starts suddenly or stays above 100 at rest.

FAQs

Does Adderall increase resting heart rate?

Yes. In trials of daily use, amphetamines raised resting heart rate by about 4 beats per minute on average, and the rise held steady past 8 weeks. A first 25 mg dose in people who had never taken it raised resting heart rate by about 10 beats per minute.

Is a heart rate over 100 normal on Adderall?

No. Adderall nudges heart rate up, but a resting rate above 100 is tachycardia and is not a typical effect at prescribed doses. It is worth checking the dose, caffeine intake and hydration, and getting an exam and ECG if it persists.

Can Adderall cause a heart attack in a healthy young person?

It is rare. Large studies of young people with prescriptions found serious heart events at about 3 per 100,000 person-years and no clear increase with ADHD drugs. The risk is less certain with misuse, high doses, or mixing with other stimulants.

Is Adderall safe if you have high blood pressure?

It can raise blood pressure further, so the pressure should be controlled and checked regularly during treatment. Long-term use was linked to higher odds of high blood pressure in a large Swedish study.

Bottom Line

Adderall raises heart rate and blood pressure. A first 25 mg dose added about 10 beats per minute and 10 points of systolic pressure in healthy young adults, while daily prescribed use adds about 4 beats and 2 points on average. Large studies have not found a clear rise in heart attacks among prescribed users, but long-term use is linked to more high blood pressure, and misuse without medical screening carries risks these studies did not measure.

How Much Does Adderall Raise Your Heart Rate?