The scene is common enough to be a genre. A wearable shows a resting heart rate a few beats per minute higher than it used to be. A search follows, and the internet offers two useless extremes: reassurance that means nothing, or alarm with no source. What the search rarely surfaces is that the prescribing labels address this directly, with numbers, percentages and, in one case, a sentence about uncertainty that is more honest than almost anything written about the subject.
So, the immediate answer first. Yes, this is a described effect. It appears in the prescribing information for Wegovy, Zepbound and Mounjaro, and the typical size reported is a mean increase of a few beats per minute compared with placebo. Everything else in this article is the harder and more useful work: what the distribution behind that average looks like, what the labels actually ask of a patient, and where the number on your watch comes from.
What the labels say, in numbers
Wegovy carries a dedicated warning titled heart rate increase. Per the label, treatment was associated with increases in resting heart rate, and mean increases of 1 to 4 beats per minute were observed in Wegovy treated adult patients compared to placebo in the clinical trials for weight reduction. Zepbound's label reports a mean increase of 1 to 3 beats per minute compared to no increase in placebo treated patients, and Mounjaro's reports a mean increase of 2 to 4 beats per minute against a mean increase of 1 beat per minute on placebo.
One absence is worth stating carefully: the Ozempic label carries no heart rate warning. That is a fact about the labels as they read today, not a comparison of the medicines, and this article does not extrapolate a warning onto a product whose label does not carry one.
The average, and the tail behind it
A mean of 1 to 4 beats per minute sounds small, and it is. But the Wegovy label also reports the distribution, and the distribution is the more honest picture. More adult patients treated with Wegovy than placebo had maximum changes from baseline at any visit of 10 to 19 bpm, 41 percent versus 34 percent, and of 20 bpm or more, 26 percent versus 16 percent. In a pediatric trial in patients aged 12 years and older with normal baseline heart rate, more treated patients had a maximum change of 20 bpm or more, 54 percent versus 39 percent, and the label notes that findings were similar in a trial with the Wegovy tablets.
Read those middle numbers again, because they carry the practical point. A maximum change of 20 beats per minute or more at some visit happened to 26 percent of people on the medicine, and to 16 percent of people on placebo. Plenty of people taking nothing at all had a reading that would alarm a watch owner. Averages smooth exactly these peaks out, and a wearable catches exactly these peaks, which is why the number someone sees on a wrist can look alarming next to a label's average. Both numbers are real; they describe different things.
GLP 1 Tracker AppA side effect diary with severity, dates and notes, kept privately on your phone. Palpitations noted down become something a clinician can actually read.
Get the app
The sentence about uncertainty, and what the label asks
The Mounjaro label adds a detail the others do not. Episodes of sinus tachycardia, associated with a concomitant increase from baseline in heart rate of 15 beats per minute or more, were reported in 4.3 percent of placebo subjects and 4.6, 5.9 and 10 percent of subjects on Mounjaro 5 mg, 10 mg and 15 mg respectively. And then comes the sentence that should anchor any honest discussion of this subject: the clinical relevance of heart rate increases is uncertain.
That is the label's own language, and this article is not going to resolve what the label declines to resolve. What the Wegovy label asks of a patient is specific and small: monitor heart rate at regular intervals consistent with usual clinical practice, and inform your healthcare providers of palpitations or feelings of a racing heartbeat while at rest. Not a daily pulse check, not a test to request, not a number to stay under. Tell your clinician about palpitations or a racing heartbeat at rest. That is the whole instruction, and this article stops there too.
Where the number on your watch comes from
Most people meet this effect through a wearable, and the meeting place deserves its own paragraph. A resting heart rate from a watch is an estimate, and it moves for reasons that have nothing to do with medication: a short night of sleep, alcohol the evening before, a cold coming on, morning coffee, dehydration, plain anxiety. Each of those has its own territory on this site when it intersects with GLP-1s, including Alcohol on a GLP-1: What to Know and What to Track, Coffee on a GLP-1: What Changes and What to Track, Sleep and GLP-1 Weight Loss: The Overlooked Variable and Why Hydration Matters More on a GLP-1.
A note on tooling, because it gets asked. GLP 1 Tracker reads weight, steps, active energy and water from Apple Health, and it does not read heart rate, so the app will not show you this number and does not claim to. What it does hold is a side effect diary with severity, where an episode of palpitations or a racing heartbeat, noted with a date and a severity, becomes part of a record a clinician can read. The full picture of what syncs and what stays manual is in GLP-1 Tracking and Apple Health: Better Together, and the habits of a useful diary are in How to Track GLP-1 Side Effects (and What to Show Your Doctor).
While heart rate rises, blood pressure falls
The last piece of context is the strangest. In the same trial tables where heart rate rose, blood pressure fell. In one Wegovy table, heart rate rose 3.8 beats per minute against placebo's 0.7, a difference of 3.1 bpm, in the same table where systolic blood pressure fell 3.3 mmHg more than placebo. Two cardiovascular numbers moving in opposite directions in the same people is not a contradiction; it is two different measurements doing two different things, and the blood pressure side, with its own label numbers and its own article, is at GLP-1s and Blood Pressure: What the Trials Measured.
That is the whole honest picture a label gives: an average rise of a few beats, a tail of larger swings that also appears on placebo, an instruction to report palpitations or a racing heartbeat at rest, and an explicit statement that the clinical relevance is uncertain. If your watch has been showing you a number you did not expect, that number belongs in a conversation with your clinician, not in a comment section, and the notes you bring to that conversation are the most useful thing any article can ask you to keep.
Frequently asked questions
Does Wegovy increase heart rate?
Yes, it is a described effect with its own warning on the label. Mean increases in resting heart rate of 1 to 4 beats per minute were observed in Wegovy treated adult patients compared to placebo in the weight reduction trials. The distribution matters as much as the average: 26 percent of treated adults had a maximum change of 20 bpm or more at some visit, compared with 16 percent on placebo. The label asks patients to tell their healthcare provider about palpitations or a racing heartbeat while at rest.
Why is my resting heart rate higher on my Apple Watch since starting a GLP-1?
Heart rate increases are a described effect of some of these medicines, printed in the prescribing information with numbers, so the observation fits something real. Two cautions belong next to it. A watch's resting heart rate is an estimate, affected by sleep, alcohol, illness, caffeine, dehydration and anxiety. And a wearable catches the maximum readings that a label's average smooths over, so the number on a wrist can look larger than the label's mean increase of a few beats per minute.
Is the heart rate increase from GLP-1s dangerous?
This article cannot and does not answer that for any individual, and it gives no normal range and no concerning number. What the labels say is precise in its limits: the Mounjaro label states that the clinical relevance of heart rate increases is uncertain. What the Wegovy label asks of patients is specific and small: inform your healthcare provider of palpitations or feelings of a racing heartbeat while at rest, with heart rate monitored at regular intervals consistent with usual clinical practice.
Does Ozempic raise heart rate?
The Ozempic label carries no heart rate warning, and this article does not extrapolate one onto it. The dedicated heart rate warnings sit on the Wegovy, Zepbound and Mounjaro labels, each with its own figures. The absence of a warning on one label and the presence on another is a fact about what each label says, not a ranking of the medicines, and questions about a specific product belong with the prescriber who manages it.
Does the app read heart rate from Apple Health?
No. GLP 1 Tracker reads weight, steps, active energy and water from Apple Health, read-only, and heart rate is not on that list. What the app does hold is a side effect diary with severity, where palpitations or a racing heartbeat noted with a date becomes part of the record a clinician can read at an appointment. The full picture of what the app reads and does not read is on the Apple Health page.