Mounjaro vs Ozempic
By Jillian Foglesong Stabile, MD, FAAFP, DABOM
May 7, 2026
Prescription Drugs, Your Health & Wellness
Mounjaro vs Ozempic
Mounjaro and Ozempic are both injectable medications for type 2 diabetes that can also support weight loss. When comparing Mounjaro vs Ozempic, Mounjaro (tirzepatide) acts on two hormone pathways, and studies suggest it may lead to greater weight loss than Ozempic (semaglutide), which targets only one.
What is Mounjaro?
Mounjaro is a prescription medication that is approved by the Food and Drug Administration (FDA) to treat type 2 diabetes. Mounjaro is sometimes used off-label to treat obesity. The active ingredient in Mounjaro is tirzepatide, a once-weekly injectable drug that affects 2 hormones, Glucagon-like peptide 1 (GLP-1) and glucose-dependent insulinotropic peptide (GIP). Mounjaro activates both of these pathways, which increases the amount of insulin produced and decreases the amount of sugar released in the liver.
Mounjaro also decreases the rate at which food leaves the stomach, which can help improve blood sugar control and decrease appetite. Many people who take Mounjaro experience weight loss as a side effect of the medication, which can benefit overall health. Tirzepatide is also approved under the brand name Zepbound to treat obesity and sleep apnea. Mounjaro is typically part of a comprehensive treatment program that includes diet and exercise.
What is Ozempic?
Ozempic is also a prescription medication approved by the FDA to treat type 2 diabetes. The active ingredient in Ozempic is semaglutide, which acts on the GLP-1 receptor to lower blood sugars. This medication also slows food emptying from the stomach. Ozempic is administered once a week as an injection. Like Mounjaro, Ozempic also has weight loss as a side effect for many people. Ozempic is often prescribed along with diet and exercise for managing diabetes. Because of the improvements in weight seen in people with type 2 diabetes who take Ozempic, it has become increasingly common for people to use Ozempic off-label for weight loss.
Why use Mounjaro vs Ozempic for weight loss?
Both Ozempic and Mounjaro are approved to manage type 2 diabetes, and neither medication is approved to treat obesity. However, because they have weight loss as a side effect, the medications have gained popularity as off-label treatments for obesity. The active ingredients in both Ozempic and Mounjaro are approved for chronic weight management under different brand names.
What is the difference between Ozempic and Mounjaro?
Since both medications are used to treat type 2 diabetes, many people wonder what is the difference between Mounjaro and Ozempic. While Ozempic and Mounjaro are both injectable medications used to treat type 2 diabetes, they differ in their mechanisms of action. Ozempic, semaglutide, is a GLP-1 receptor agonist that helps decrease blood sugar by increasing the release of insulin, decreasing the production of glucose in the liver, and slowing the emptying of the stomach.
Mounjaro, on the other hand, contains tirzepatide and acts on both the GLP-1 and GIP receptors. The dual-action mechanism can help improve blood sugars and support weight loss. Clinical trials have shown that Mounjaro can lead to greater improvements in blood sugar and greater weight loss than Ozempic.
| Ozempic (semaglutide) | Mounjaro (tirzepatide) | |
| Mechanism of Action | GLP-1 | GLP-1 and GIP |
| FDA Approval | -Type 2 diabetes -Reducing cardiovascular risk in type 2 diabetes with heart disease -Chronic kidney disease | -Management of overweight and obesity -Moderate to severe sleep apnea |
| Weight Loss Use | Off-label | Approved |
| Average Weight Loss | 10-15% of body weight | 15-21% of body weight |
| Side Effects | Nausea, vomiting, diarrhea, constipation, abdominal pain | Nausea, vomiting, diarrhea, constipation, indigestion, abdominal pain |
| Contraindications (Relative and absolute) | -Personal or family history of Medullary Thyroid Carcinoma -Personal or family history of Multiple Endocrine Neoplasia Syndrome Type 2 -Allergy to semaglutide -Pregnancy -Severe kidney or gastrointestinal disease -Pancreatitis | -Personal or family history of medullary thyroid carcinoma -Personal or family history of Multiple Endocrine Neoplasia Syndrome Type 2 -Allergy to tirzepatide -Pregnancy |
Choosing between the two medications often depends on factors such as individual health needs, side effects, insurance formularies, and healthcare provider recommendations.
Is Mounjaro the same as Ozempic?
Mounjaro and Ozempic are different medications with different mechanisms of action, though they both treat type 2 diabetes and support weight loss. Ozempic, which contains semaglutide, targets only the GLP-1 receptor, while Mounjaro, which contains tirzepatide, targets both GLP-1 and GIP receptors.
Is Mounjaro better than Ozempic for weight loss?
While Mounjaro and Ozempic are both approved to treat type 2 diabetes and are not approved for weight management, they both have the potential to support weight loss. This leaves many people wondering if Mounjaro is better than Ozempic for weight loss. Research studies suggest that Mounjaro may result in more weight loss than Ozempic. However, each person responds differently to medications, and both medications can result in significant weight loss when combined with lifestyle changes such as diet and exercise.
Ozempic vs Mounjaro side effects: what side effects are common between the two drugs?
Side effects are important when considering Ozempic vs Mounjaro for weight loss. Mounjaro and Ozempic share many common side effects because they both act on the GLP-1 receptor. The most common side effects of both medications are gastrointestinal.
Common side effects that the medications share include:
- Heartburn
- Headaches
- Nausea
- Vomiting
- Diarrhea
- Constipation
- Abdominal pain
Both Mounjaro and Ozempic have side effects that typically improve with time as the body adjusts to the medications. Fatigue and dizziness are also often seen in patients on Mounjaro vs Ozempic. In rare instances, these medications may cause pancreatitis, gallbladder problems, or even allergic reactions.
What side effects are not common between Ozempic and Mounjaro?
While Ozempic and Mounjaro share many common side effects, there are some differences between them. Mounjaro is more likely to cause injection site reactions and may increase the risk of hair loss. Ozempic, on the other hand, is more likely to cause changes in taste and increases in heart rate.
Ultimately, if you experience side effects from Ozempic, Mounjaro, or another medication, you should consult your healthcare provider for advice.
How successful is Mounjaro in treating obesity?
Mounjaro is not specifically indicated to treat obesity, but it is sometimes used off-label for this purpose. Tirzepatide, the active ingredient in Mounjaro, has been shown to significantly decrease weight. Because the medication affects both the GLP-1 and GIP receptors, it can reduce appetite and increase satiety. Studies evaluating tirzepatide for weight loss have demonstrated an average of 15-22% loss of body weight over 72 weeks in people who have obesity or overweight.
How successful is Ozempic for weight loss?
Ozempic is only approved to treat type 2 diabetes, but has been shown to be highly effective at reducing weight in this population. Semaglutide, the active ingredient in Ozempic, is FDA-approved for weight management under a different brand name, Wegovy. In clinical trials, semaglutide has demonstrated 10-15% weight loss over several months when combined with exercise and diet.
Ozempic versus Mounjaro: Related FAQs
Why is Mounjaro better than Ozempic for weight loss, according to some clinical studies?
Mounjaro may result in more weight loss than Ozempic because it targets both the GLP-1 and GIP receptors. This may result in greater appetite suppression and other metabolic benefits that can result in a more significant weight loss than Ozempic's effects on the GLP-1 receptor alone. Ultimately, determining which is better, Mounjaro or Ozempic, requires careful consideration of factors other than just weight loss.
How much more effective is Mounjaro compared to Ozempic for weight loss?
Clinical trials have shown that tirzepatide, the active ingredient in Mounjaro, may lead to around 15-22% weight loss over 72 weeks. Semaglutide, the active ingredient in Ozempic, on the other hand, has resulted in 10-15% weight loss. This means that Mounjaro may provide up to around 5-7% more weight loss compared to Ozempic for many patients.
Mounjaro vs Ozempic cost: which is cheaper?
For many people, cost is an important consideration in choosing a medication. Healthcare providers often consider Mounjaro vs Ozempic costs when choosing a medication. Mounjaro and Ozempic are both expensive medications. Mounjaro can have out-of-pocket prices up to almost $1,200 per month, while Ozempic prices are similar for out-of-pocket costs. In some cases, Ozempic may be very slightly less expensive than Mounjaro.
Insurance costs can vary based on which medication is on the formulary. You can call your insurance company before seeing your healthcare provider to help guide decisions about which medication may be less expensive.
How often do you need to take Mounjaro vs Ozempic for weight loss?
Both Mounjaro and Ozempic are administered once weekly as injections for both diabetes and weight loss. It is generally recommended that the medications be administered on the same day each week. The medications are usually started at lower doses and gradually titrated up based on blood sugar results.
Both Ozempic and Mounjaro are considered long-term medications to treat type 2 diabetes. Improvements in blood sugars and weight reduction may start within a few weeks. Weight regain is likely if the medication is stopped.
Can you switch between Mounjaro and Ozempic?
It is possible to switch between Mounjaro and Ozempic, but this should only be done at the recommendation of a healthcare provider. Healthcare providers carefully consider dosage, side effects, and individual health factors when deciding whether to switch between the medications.
What to expect when switching from Ozempic to Mounjaro?
When switching from Ozempic to Mounjaro, you may experience a decrease in appetite, better control of blood sugars, or potentially appetite suppression because of the dual mechanism of Mounjaro. Some people have more nausea or diarrhea. Your healthcare provider can help you determine how to safely transition from one to the other and how to adjust doses to minimize side effects.
Can you use Ozempic and Mounjaro along with other weight loss treatments?
Combining Ozempic or Mounjaro with other medications for weight loss is generally not recommended. In some cases, a healthcare provider may recommend combining medications under careful supervision. Combining multiple medications can increase the risk of side effects. However, either medication can be safely combined with lifestyle changes such as diet and exercise for weight loss.
Is Mounjaro safer than Ozempic?
Mounjaro and Ozempic both have similar side effects and safety profiles. They may cause side effects such as nausea, vomiting, or diarrhea. In rare cases, serious side effects may occur. Pancreatitis and gallbladder issues are potentially serious side effects of the medications. There is no data to suggest that one drug is safer than the other. Your healthcare provider can assess which medication is most appropriate for your unique needs.
Does Ozempic suppress appetite better than Mounjaro?
No, Ozempic does not suppress appetite better than Mounjaro. In fact, some clinical studies suggest that tirzepatide, the active ingredient in Mounjaro, may suppress appetite more effectively than semaglutide, the active ingredient in Ozempic. This is believed to be due to Mounjaro's dual action on both the GLP-1 and GIP receptors, rather than the single action mechanism of Ozempic, which acts on the GLP-1 pathway alone.
How to decide if you should take Mounjaro or Ozempic?
Your healthcare provider can help you determine which medication would be better for you. The decision will factor in your unique health goals, medical history, insurance coverage, and potential side effects. Your healthcare provider will discuss efficacy, safety, and cost.
Who can't take Ozempic or Mounjaro?
There are only two conditions that absolutely exclude people from using Ozempic or Mounjaro. People who have a personal or family history of medullary thyroid carcinoma (MTC) or those who have a personal or family history of multiple endocrine neoplasia syndrome type 2 (MEN2) should not take Mounjaro or Ozempic. Conditions, such as a history of pancreatitis, pregnancy, kidney disease, or gastroparesis, may be contraindications to Ozempic and Mounjaro, but this is often at the discretion of your healthcare provider. Your healthcare provider can help you determine which medication options are best for you.
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https://www.thelancet.com/journals/eclinm/article/PIIS2589-5370(26)00043-X/fulltext
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