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How does Ozempic work for weight loss?

Medically reviewed by Leigh Ann Anderson, PharmD. Last updated on March 17, 2025.

Official Answer by Drugs.com

Ozempic helps with weight loss by slowing down how fast food travels through your digestive tract. This can help you feel fuller for a longer period of time, and reduce your appetite and how much food you eat, leading to weight loss. In clinical studies, patients lost an average of 14 lbs (6.4 kg) when Ozempic was given over a 40-week long period.

Ozempic contains the GLP-1 receptor agonist semaglutide and is approved to treat type 2 diabetes to help you manage your blood sugar control. It helps prevent large blood sugar spikes, and you may feel less hungry when you do not have wide swings in your blood sugar. Studies have found that people who use Ozempic to treat type 2 diabetes often lose weight as a secondary benefit.

It's also used to help protect you from a heart attack, stroke or death if you have heart disease, and to reduce the risk of worsening kidney disease and heart-related death in patients with type 2 diabetes.

If you are looking for a medicine specifically approved for weight loss, a brand name drug called Wegovy may be an option. Wegovy contains a slightly higher dose of semaglutide (the same active ingredient in Ozempic), but is FDA-approved to help people with obesity or who are overweight lose weight and keep it off over the long-term.

Both Ozempic and Wegovy are manufactured by Novo Nordisk.

How much weight can you lose with Ozempic?

Results from studies in patients with type 2 diabetes show that people lost up to 14 lbs (6.4 kg) on average using the 2 mg weekly dose over 40 weeks when compared to a placebo. Significant weight loss has also been seen when Ozempic was compared to other diabetes treatments like Trulicity (dulaglutide), Bydureon (exenatide) or Januvia (sitagliptin).

Studies

Ozempic vs. placebo

Adults in two studies weighed an average of 202 lb (91.8 kg) or 219 lb (99.5 kg) at the beginning of the studies.

Studies also found that people with type 2 diabetes lost at least double the weight with Ozempic when compared to Trulicity (dulaglutide) or Bydureon (exenatide), other glucagon-like peptide-1 (GLP-1) agonist type 2 diabetes medicines, when given over 40 to 56 weeks.

Ozempic vs. Trulicity

Ozempic vs. Bydureon

Ozempic vs. Januvia

Ozempic is given as a once-weekly injection under the skin in the stomach area, the thigh, or the upper arm using an autoinjector pen. It’s used on the same day each week and you can take it with or without food. Your healthcare provider can teach you or a caregiver how to inject the medicine so it can be used at home.

In Ozempic studies, not all people lost weight and some people did gain weight. You may also be taking other medicines like a sulfonylurea (like glipizide or glyburide), or insulin, which can also add to weight gain. Metformin does not usually lead to weight gain, and may help promote weight loss in some individuals.

Studies suggest that higher doses of Ozempic or semaglutide may lead to greater weight loss. The Wegovy brand of semaglutide contains a higher dose of semaglutide, is FDA-approved for weight loss and may result in a greater weight loss for you. In studies with Wegovy, adults lost around 15% of their body weight, equal to about 35 lb (16 kg).

People respond to medicines differently, so your weight loss may not be the same as others. Treatments for type 2 diabetes are used in addition to an appropriate diet and exercise regimen for the best effect. Talk to your healthcare provider about the best medicine to help you lose weight.

How long does it take to lose weight with Ozempic?

Ozempic starts to work right away, but you may not see significant weight loss for several months. Ozempic has led to weight loss and blood sugar control in studies ranging from 30 to 56 weeks in length, when used in addition to diet and exercise.

It has been shown to lead to weight loss in patients with type 2 diabetes, but is not specifically FDA-approved as a weight-loss medication.

Learn more: How long does it take for Ozempic to work?

How can you lose the most weight with Ozempic?

Staying active and eating a healthy diet low in fat, sugar and calories is the best way to lose weight with Ozempic. Your doctor may suggest you meet with a dietician to help learn about meal planning and food choices.

An exercise routine on most days of the week can boost your weight loss, your mood and help you meet your targets. If you have not exercised in a while, or have any health conditions, speak with your healthcare provider about the best way to ease into an exercise routine. Working with a trainer or a physical therapist may prove beneficial, especially at the outset.

Also, follow your doctor’s dosing instructions exactly. You will start treatment with lower doses to help you tolerate the stomach side effects like nausea, vomiting, diarrhea, stomach pain or constipation. These side effects are typically mild to moderate and lessen over time.

Some foods may worsen your nausea or other stomach side effects while taking Ozempic. If you are experiencing stomach side effects, try:

These foods or drinks may also affect your blood sugar control and slow down weight loss.

Learn More: Taking Ozempic: What foods should you avoid?

It may take about 2 to 3 months to reach your Ozempic maintenance dose, so going slowly, as directed, can help you tolerate the medicine and prevent you from having to stop treatment altogether. Higher doses have been shown to lead to greater weight loss.

Related questions

Does Ozempic cause side effects that lead to weight loss?

Stomach side effects are common when starting treatment with Ozempic but decrease over time in most patients. At the beginning of treatment this may affect your appetite. In one study, 58% of patients (231 of 402) receiving a semaglutide 1 mg dose experienced mild to moderate gastrointestinal side effects.

The most common side effects reported in at least 5% of patients treated with Ozempic are:

In Sept. 2023, the FDA updated the warnings for Ozempic to emphasize that an intestinal blockage called an ileus has been reported as a possible side effect. An ileus results in the failure of the intestinal contents to pass through the gut.

An ileus may lower your appetite and cause symptoms like nausea, vomiting, stomach pain, and bloating, which may make eating uncomfortable or irritating. Contact your healthcare provider right away if you have stomach side effects that worry you.

Is Ozempic FDA-approved for weight loss?

Ozempic is not FDA-approved for weight loss, but was shown in studies to help people lower their blood sugar and lose weight when it was used to treat type 2 diabetes.

Approved uses

The Ozempic brand of semaglutide is FDA-approved to be used alongside diet and exercise to improve blood sugar (glucose) control in adults with type 2 diabetes. It's also used to reduce the risk of major cardiovascular events such as a heart attack, stroke, or death in adults with type 2 diabetes with known heart disease.

Ozempic is in a class of drugs known as glucagon-like peptide-1 (GLP-1) agonists (also called incretin mimetics). It is prescribed to help lower your blood sugar levels and A1C in type 2 diabetes.

The Wegovy brand of semaglutide is approved for weight loss in adults and children 12 years and older with obesity or adults who are overweight and also have weight-related medical conditions, like high blood pressure, type 2 diabetes or high cholesterol. Wegovy may be an option for you if you are looking for a medicine specifically to lose weight.

Wegovy is also approved to reduce the risk of heart attacks, strokes, and cardiovascular death in adults with heart disease and who have either type 2 diabetes (Ozempic) or are obese or overweight (Wegovy). It's also used in addition to diet and exercise.

Other GLP-1-like drugs in the same or similar classes include:

Can non-diabetics use Ozempic for weight loss?

Yes, in many cases non-diabetics can use Ozempic for weight loss. Studies with semaglutide, the active ingredient in Ozempic, have shown weight loss can occur in people with or without type 2 diabetes.

Your healthcare provider may decide to prescribe Ozempic "off-label" for you for weight loss. Off-label means it's not specifically approved by the FDA for this use or listed in package labeling, but your doctor has decided it may still have a positive benefit and can prescribe it.

While Ozempic can help with weight loss, not everyone may be able to use it. Your healthcare provider may decide another weight loss option is more appropriate, there could be a shipping delay or shortage of the medicine, or your insurance company may only cover it for treatment of type 2 diabetes and not weight loss. They may prefer you use a different medication before they will pay for it.

Your insurance may pay for Wegovy for weight loss, and you should check. Wegovy is semaglutide, the same medicine that's in Ozempic, but is specifically approved for weight loss in adults and children 12 years and older. It can be used in people with or without type 2 diabetes and it's given at a slightly higher dose than Ozempic.

Both drugs can also help to protect you from a heart attack, stroke or death if you have been diagnosed with heart disease. Ozempic is also approved to reduce the risk of worsening kidney disease and cardiovascular death in patients with type 2 diabetes.

How do you qualify for Ozempic for weight loss?

In the U.S., you will most likely qualify for Ozempic coverage for weight loss if you are also being treated for type 2 diabetes. Most insurance companies do not cover this product for weight loss alone because it is not specifically approved by the FDA for that use, even if your doctor has written you a prescription.

Ozempic use for weight loss is considered “off-label” (not approved). Insurance companies may not pay for “off-label” or unapproved uses of drugs, even though may be effective.

Because Ozempic is a medicine typically used long-term, costs can be significant if you must fully pay with cash for this medicine for weight loss. The cost for Ozempic typically runs between $0 and $1051 per month. There are no generic alternatives for Ozempic at this time.

Related: Ozempic coupons that might help you save money

If your doctor prescribes you Ozempic “off-label” for weight loss, but your insurance does not cover it, consider these other possibilities:

This is not all the information you need to know about Ozempic for safe and effective use and does not take the place of your doctor’s directions. Review the full product information and discuss this information and any questions you have with your doctor or other health care provider.

References
  • Pratley RE, Aroda VR, Lingvay I, et al; SUSTAIN 7 investigators. Semaglutide versus dulaglutide once weekly in patients with type 2 diabetes (SUSTAIN 7): a randomised, open-label, phase 3b trial. Lancet Diabetes Endocrinol. 2018 Apr;6(4):275-286. doi: 10.1016/S2213-8587(18)30024-X
  • Ahmann AJ, Capehorn M, Charpentier G, et al. Efficacy and Safety of Once-Weekly Semaglutide Versus Exenatide ER in Subjects With Type 2 Diabetes (SUSTAIN 3): A 56-Week, Open-Label, Randomized Clinical Trial. Diabetes Care. 2018 Feb;41(2):258-266. doi: 10.2337/dc17-0417
  • Ahrén B, Masmiquel L, Kumar H, et al. Efficacy and safety of once-weekly semaglutide versus once-daily sitagliptin as an add-on to metformin, thiazolidinediones, or both, in patients with type 2 diabetes (SUSTAIN 2): a 56-week, double-blind, phase 3a, randomised trial. Lancet Diabetes Endocrinol. 2017 May;5(5):341-354. doi: 10.1016/S2213-8587(17)30092-X
  • Kommu S, Berg RL. Efficacy and safety of once-weekly subcutaneous semaglutide on weight loss in patients with overweight or obesity without diabetes mellitus - A systematic review and meta-analysis of randomized controlled trials. Obes Rev. 2024 Sep;25(9):e13792. doi: 10.1111/obr.13792
  • Ozempic (semaglutide) [Package Insert]. Revised 11/2024. Novo Nordisk. Plainsboro, NJ. Accessed Jan 6, 2025 at https://www.novo-pi.com/ozempic.pdf
  • Davies M, Færch L, Jeppesen OK, et al; STEP 2 Study Group. Semaglutide 2·4 mg once a week in adults with overweight or obesity, and type 2 diabetes (STEP 2): a randomised, double-blind, double-dummy, placebo-controlled, phase 3 trial. Lancet. 2021 Mar 13;397(10278):971-984. doi: 10.1016/S0140-6736(21)00213-0.
  • Ozempic (semaglutide) injection—Compelling weight loss across doses. NovoMedlink. Accessed Jan 6, 2025 at https://www.novomedlink.com/diabetes/products/treatments/ozempic/efficacy-safety/ozempic-and-weight.html
  • Frequently Asked Questions (FAQs). Ozempic.com. Accessed Jan 6, 2025 at https://www.ozempic.com/faqs.html
  • Drug Safety Drug Safety-related Labeling Changes (SrLC). FDA. Accessed Jan 6, 2025 at https://www.accessdata.fda.gov/scripts/cder/safetylabelingchanges/index.cfm?event=searchdetail.page&DrugNameID=2183
  • Ozempic.com. Accessed Jan 6, 2025 at https://www.ozempic.com/why-ozempic/diabetes-medicines-comparison.html#weightInfo
  • ​Wegovy (semaglutide) [Package insert]. Revised 11/2024. Lilly and Co. Indianapolis, IN. Accessed Jan 6, 2025 at https://www.novo-pi.com/wegovy.pdf

Read next

How do Ozempic, Mounjaro, Wegovy, Zepbound compare for weight loss?

Ozempic, Mounjaro, Wegovy and Zepbound can all lead to long-term weight loss, but only Wegovy and Zepbound are approved by the FDA for this use. In studies, Zepbound has led to a 21% weight loss in adults using the highest dose, while Wegovy has led to about a 15% weight loss. Continue reading

How long does it take for Ozempic to work?

Your blood glucose (sugar) levels should start to fully decline within the first week after you start using Ozempic (semaglutide) at your regular dose. However, the full effect can take 8 weeks or longer, as this is a long-acting medication that is injected only once per week. Continue reading

Wegovy vs Ozempic: Which is Right for You?

Both Wegovy and Ozempic contain semaglutide, but Wegovy is prescribed for long-term weight management while Ozempic is used to control blood sugar levels in type 2 diabetes and help protect kidney function. They both lower the risk for heart-related complications, but they differ in other approved uses, doses, target populations and costs. Continue reading

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