Ozempic and Sleep: Does Semaglutide Affect Your Sleep?

Quick answer: semaglutide, the medicine in Ozempic and Wegovy, is not listed as a cause of insomnia on the NHS medicine page or in the US prescribing information, but feeling tired is a recognised common side effect. Some people do sleep worse on it, most plausibly because side effects such as nausea, indigestion, reflux and burping can be worse at night, rather than because the drug acts on sleep directly. And if you have heard that these drugs treat sleep apnea, the dedicated sleep apnea trials and the FDA approval are for a different medicine, tirzepatide (Zepbound), not semaglutide.

Who This Is For

You take semaglutide (Ozempic or Wegovy) or tirzepatide (Mounjaro or Zepbound) and your sleep has changed
You are waking up queasy, with heartburn, or just more often than before
You feel more tired than usual since starting or increasing your dose
You snore or have sleep apnea and want to know what these medicines can and can’t do for it

Quick Fix / Summary

Note your injection day, dose changes and bad nights for two weeks to spot a pattern
Eat smaller meals and avoid eating in the 3 to 4 hours before bed if nausea or reflux wakes you
Raise the head of your bed if heartburn is worse lying down
Tell your prescriber or pharmacist if side effects are bothering you or not going away
Don’t stop the medicine on your own; ask about options first
If you snore or gasp at night, ask about a sleep apnea check rather than relying on weight loss alone

Does Semaglutide (Ozempic, Wegovy) Affect Sleep? What the Evidence Shows

Here is what the evidence does and does not support, claim by claim. “Established” means it appears in official medicine information or a large randomised trial. “Plausible” means it follows from known side effects but has not been measured directly as a sleep outcome.

Claim	What the evidence says	Verdict
Semaglutide causes insomnia	Not listed among side effects on the NHS semaglutide page or in the Ozempic and Wegovy US prescribing information	Not established
Semaglutide can make you tired	NHS lists “feeling tired” as common. The Wegovy label lists fatigue among its most common side effects	Established
Stomach side effects can disturb sleep	Nausea, vomiting, diarrhoea, constipation and stomach pain are listed for both medicines; Wegovy also lists indigestion, burping and reflux. Reflux is typically worse lying down	Plausible (side effects established, sleep effect not measured)
Low blood sugar can wake you at night	Hypoglycaemia is mainly a risk when semaglutide is used with insulin or a sulfonylurea	Established for that group only
Semaglutide treats sleep apnea	Not approved for sleep apnea. One exploratory analysis found fewer new sleep apnea reports, which is not proof of treatment	Not established
Tirzepatide (Zepbound) treats sleep apnea	Two randomised trials published in 2024 and an FDA approval in December 2024	Established (but this is a different drug)

Does Semaglutide Cause Insomnia? What the Official Side-Effect Lists Say

The NHS semaglutide page lists these common side effects: feeling sick (nausea) and being sick (vomiting), constipation, diarrhoea, feeling tired, itchy or red skin where you inject, and hair loss. Trouble sleeping is not on the list.

The US prescribing information tells a similar story. The Ozempic label lists nausea, vomiting, diarrhoea, abdominal pain and constipation as the most common side effects. The Wegovy label (revised February 2026) adds headache, fatigue, indigestion (dyspepsia), dizziness, bloating, burping, wind, gastroenteritis, reflux (gastroesophageal reflux disease) and, in people with type 2 diabetes, low blood sugar. Insomnia does not appear in either list.

That does not mean nobody sleeps worse on semaglutide. It means insomnia has not shown up as a recognised direct side effect, so when sleep does change, the more likely explanations are the side effects that are listed.

Why Some People Sleep Worse on Semaglutide and Other GLP-1s

Nausea, indigestion and reflux at night

Stomach side effects are the most common reason people struggle on these medicines. In the Wegovy trials, nausea was reported by 44% of adults on Wegovy injections compared with 16% on placebo, and the label notes that stomach side effects were most often reported while the dose was being increased. Reflux and indigestion are a particular problem at bedtime, because the NHS notes that heartburn tends to be worse after eating, when lying down and when bending over.

If you wake up queasy or with a sour taste, our guides to why acid reflux gets worse at night and waking up feeling sick cover the practical fixes.

Changes in when and how much you eat

Semaglutide reduces appetite, so meal times and portion sizes often change. Some people end up eating one late meal, which makes night-time reflux more likely; others go to bed hungrier than usual. These effects are plausible but have not been studied as sleep outcomes, so treat them as things to test in your own routine.

Low blood sugar, mainly with other diabetes medicines

The NHS lists low blood sugar (hypoglycaemia), with sweating, shaking, heart palpitations and dizziness, as a serious side effect that is more likely if semaglutide is used with other diabetes medicines. The Wegovy label says the risk was higher when semaglutide was combined with insulin or an insulin secretagogue such as a sulfonylurea. If you take one of those and wake sweaty or shaky, tell your prescriber. If you don’t have diabetes, a night-time blood sugar dip is a much less likely explanation; how blood sugar affects sleep explains why the evidence is limited.

Feeling Tired on Semaglutide

Tiredness is the side effect most clearly linked to semaglutide. The NHS lists “feeling tired” as common, and in the Wegovy adult trials fatigue was reported by 11% of people on the medicine compared with 5% on placebo.

Daytime tiredness is not the same as poor sleep, but the two can feed each other: if nausea or reflux breaks up your night, you will feel it the next day. The NHS advice for side effects that bother you or don’t go away is to talk to a pharmacist or doctor. If you are tired despite a full night in bed, why you wake up tired even after 8 hours of sleep covers other common causes.

GLP-1 Weight Loss and Sleep Apnea: Tirzepatide vs Semaglutide

This is where a lot of online information gets mixed up, so it is worth being precise.

Tirzepatide (Zepbound): trial evidence and FDA approval

Tirzepatide acts on two gut hormone receptors, GLP-1 and GIP. In two randomised, placebo-controlled trials known as SURMOUNT-OSA, published in the New England Journal of Medicine in 2024, adults with obesity and moderate to severe obstructive sleep apnea took tirzepatide or placebo for 52 weeks. In the trial of people not using a CPAP machine, breathing interruptions (the apnea-hypopnea index) fell by 25.3 events per hour on tirzepatide compared with 5.3 on placebo. In people using CPAP, the falls were 29.3 and 5.5 events per hour.

On 20 December 2024 the FDA approved Zepbound for moderate to severe obstructive sleep apnea in adults with obesity, alongside a reduced-calorie diet and more physical activity. The FDA described it as the first drug treatment option for certain patients with the condition.

Semaglutide (Ozempic, Wegovy): not approved for sleep apnea

Semaglutide has no equivalent approval. The current Wegovy label covers weight management, cardiovascular risk reduction and a liver condition (MASH), not sleep apnea. The closest evidence is a 2026 exploratory analysis of the SELECT trial, reported by Sleep Review, in which fewer people on semaglutide had new sleep apnea recorded as a side effect than on placebo. Novo Nordisk, the manufacturer, described the findings as hypothesis-generating, and noted that semaglutide is not approved to treat sleep apnea and its safety and efficacy for that use have not been established.

What that means for you

Losing weight is a recognised way to improve sleep apnea, and the NHS lists losing weight, stopping smoking and cutting down on alcohol as lifestyle changes that can sometimes help. So weight lost on any GLP-1 medicine may change your snoring or apnea. But that is not the same as the drug being a proven apnea treatment. If you use CPAP, don’t stop or change it because you have lost weight; ask your sleep team whether you need a repeat sleep study. If you snore loudly or wake gasping, read what sleep apnea is and when to see a doctor and the evidence-backed alternatives to CPAP.

Tips to Sleep Better While on a GLP-1

Track the pattern. Note your injection day, any dose increase and how you slept. If bad nights cluster after a dose step, mention that to your prescriber.
Eat earlier and smaller. The NHS advice for reflux is to eat smaller, more frequent meals and avoid eating within 3 or 4 hours of bed.
Raise the head of the bed. The NHS suggests 10 to 20cm so your chest and head are above your waist.
Go easy on evening alcohol. The NHS advises not drinking too much alcohol if you get reflux.
Ask about side-effect support. Your prescriber or pharmacist can suggest ways to reduce nausea or reflux, or review how quickly your dose is increased.
Keep normal sleep habits. A fixed wake time and a calm wind-down still matter while your body adjusts.

Common Mistakes to Avoid

Assuming any GLP-1 treats sleep apnea: only tirzepatide (Zepbound) has an FDA approval for it
Stopping or changing CPAP after losing weight: check with your sleep team first
Eating one big late meal: it makes night-time reflux more likely
Stopping the medicine abruptly: the NHS advises against stopping prescribed medicines without speaking to a doctor
Treating nausea-driven waking as general insomnia: fix the stomach side effect first

When to Talk to Your Prescriber

Speak to your prescriber or pharmacist if side effects such as nausea, tiredness or reflux are bothering you or not going away, or if your sleep is still disrupted a few weeks after a dose change.

Get medical help urgently, based on the NHS list of serious side effects, if you have:

Severe pain in your stomach or back that does not go away (a possible sign of an inflamed pancreas)
Signs of low blood sugar, such as sweating, shaking, palpitations or dizziness, especially if you also take insulin or a sulfonylurea
Sudden vision loss or changes in your eyesight
Signs of a serious allergic reaction, such as swelling of the face, lips or throat, or difficulty breathing

See a GP about your sleep separately if you snore loudly, make gasping or choking noises at night, or a partner has noticed your breathing stop. Waking up gasping for air covers the possible causes.

FAQ

Does semaglutide cause insomnia?

Insomnia is not listed as a side effect on the NHS semaglutide page or in the US prescribing information for Ozempic or Wegovy. Some people do sleep worse, most plausibly because of nausea, indigestion or reflux at night, which are listed side effects.

Can Ozempic or Wegovy make you tired?

Yes. The NHS lists feeling tired as a common side effect of semaglutide, and in the Wegovy adult trials fatigue was reported by 11% of people on the medicine compared with 5% on placebo. Speak to a pharmacist or doctor if it bothers you or doesn’t go away.

Is Wegovy approved for sleep apnea?

No. Semaglutide (Wegovy, Ozempic) is not approved to treat sleep apnea. The FDA approval for obstructive sleep apnea, given in December 2024, is for tirzepatide (Zepbound), based on the SURMOUNT-OSA trials.

Why do I wake up feeling sick on Ozempic?

Nausea is one of the most common side effects of semaglutide, and reflux and indigestion tend to be worse when you lie down. Eating smaller meals, avoiding food in the 3 to 4 hours before bed and raising the head of the bed can help. Tell your prescriber if it keeps happening.

Should I stop semaglutide if it’s affecting my sleep?

Not without talking to your prescriber first. They can look at what is causing the problem, such as nausea or reflux, and may be able to adjust how your dose is increased or suggest ways to manage side effects.

Key Takeaways

Insomnia is not a listed side effect of semaglutide (Ozempic, Wegovy), but tiredness is
Sleep problems on GLP-1s are most plausibly linked to nausea, indigestion and reflux at night
Low blood sugar at night is mainly a risk when semaglutide is combined with insulin or a sulfonylurea
The sleep apnea trials and FDA approval are for tirzepatide (Zepbound), not semaglutide
Talk to your prescriber before stopping or changing any medicine, and before changing CPAP

About this article

Written by the Sleep Fixes editorial team. We’re not medical professionals. We research each topic against primary sources and hold ourselves to being critical and thorough about what actually makes it onto the site.

This article is part of Sleep Fixes, a site focused on practical, easy-to-follow solutions for common sleep problems like night waking, dry mouth, overheating, and disrupted sleep.

Side-effect information in this article comes from the NHS and the US prescribing information for Ozempic and Wegovy. Sleep apnea evidence comes from the SURMOUNT-OSA trials (New England Journal of Medicine, 2024) and the FDA. It is not medical advice. Talk to your prescriber about any medication side effects you’re experiencing.