Ozempic and Mounjaro are two prescription medications used by type 2 diabetes patients to improve blood sugar management.There are some substantial similarities between the drugs. Both are administered as weekly injections using pen devices. They also carry the risk of similar side effects, among which we can name nausea, vomiting, diarrhea, and constipation.
Most importantly, though, Ozempic and Mounjaro are effective diabetes medications. But can they aid weight loss? And how do they compare in this particular effect? We will explore this in our comprehensive guide.
What Is Ozempic and How Does It Work?
Ozempic, also referred to by its generic name semaglutide, is a prescription medication used in managing glucose levels in adults with type 2 diabetes. The drug works by mimicking the naturally produced hormone, glucagon-like peptide-1 (GLP-1) receptor agonist.- Insulin Production: This hormone is responsible for stimulating the pancreas to release insulin. By copying its effect, Ozempic facilitates increased glucose absorption from the bloodstream and its transportation into the cells, where glucose can be turned into energy.
- Glucagon Suppression: The second important action of the drug relates to glucagon regulation. Glucagon is a hormone that works opposite to GLP-1. While the latter increases insulin production, the former is responsible for increasing blood sugar levels. Ozempic suppresses glucagon production, maintaining safe blood sugar levels for patients with type 2 diabetes.
- Slower Digestion: Maybe the most crucial Ozempic effect that impacts weight loss concerns how the drug affects digestion, or more precisely, its tempo. The medication delays the emptying of the stomach, prolonging the sensation of being satiated. It also allows for a slower rise in blood sugar levels after meals.
- Appetite Control: One of the possible effects of GLP-1 is appetite suppression. This, in combination with slower stomach emptying, makes Ozempic an effective weight loss drug.
What Is Mounjaro and How Does It Work?
Mounjaro (tirzepatide), just like Ozempic, is FDA-approved to help control blood sugar levels in patients with type 2 diabetes. However, instead of one hormone, the drug targets two key gut hormones involved in blood sugar control: GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 (glucagon-like peptide-1) receptor agonist.- Insulin Production: Similar to Ozempic, tirzepatide stimulates insulin production, which aids in lowering glucose levels after meals in diabetes patients. By interacting with both GLP-1 and GIP, the medication may offer even better results in blood sugar management than its predecessors.
- Slower Digestion: Mounjaro can also promote slow stomach emptying, which, as discussed above, can impact a patient’s weight loss journey.
- Reduced Glucagon Secretion: The drug is known to suppress glucagon release and prevent excessive blood sugar rise.
Ozempic vs. Mounjaro: Key Differences
Seemingly working in the same way, Ozempic and Mounjaro are not the same exact drug. It’s important to understand differences in their effects, dosage, and potential side effects before you begin your therapy. What are some of the key differences between Mounjaro and Ozempic?Active Ingredients
Ozempic’s active ingredient is semaglutide, which acts as a glucagon-like peptide-1 (GLP-1) receptor agonist. Mounjaro takes a different approach, with tirzepatide as the active ingredient. The substance acts as a dual incretin receptor agonist, which means it targets both GLP-1 and glucose-dependent insulinotropic polypeptide (GIP). This important distinction makes it so that, according to some studies, Mounjaro is slightly more effective in lowering A1C (glycosylated hemoglobin). On the other hand, because of its dual action on GLP-1 and GIP, tirzepatide may also be responsible for more frequent side effects. Ultimately, the decision about which drug is more suitable for diabetes management or weight loss benefits should be made by a doctor based on an individual health condition and the needs of each patient.FDA approval
Ozempic
Ozempic was FDA-approved as a treatment for type 2 diabetes in 2017. As of 2024, the medication is only approved for lowering blood sugar levels in adult patients with type 2 diabetes, as well as for cardiovascular risk reduction in adult patients with type 2 diabetes. Officially, the medication is not intended to support weight loss; however, multiple studies have shown that Ozempic does present some significant benefits in reducing body weight, offering sustainable results.Mounjaro
In 2022, Mounjaro received FDA approval for improving blood sugar management in adults with type 2 diabetes, alongside diet and exercise. In November of 2023, the FDA approved tirzepatide for weight loss under the name Zepbound. While there have been promising research results on Mounjaro’s impact on weight loss, just like Ozempic, it is not currently FDA-approved for weight loss purposes.| Condition | Mounjaro | Ozempic |
| Type 2 Diabetes | FDA approved | FDA approved |
| Major cardiovascular events risk management | Off-label | FDA approved |
| Weight loss | Off-label | Off-label |
Dosage
Mounjaro as well as Zepbound are available in six different dosages, including 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg and 15mg. When it comes to Ozempic, you can purchase it in a smaller number of doses, such as 0.25mg, 0.5mg, 1.0mg, and 2.0mg. Both Mounjaro and Ozempic are injectable and usually administered in a one-dose-per-week schedule. You will learn about how both medications are usually dosed later in this article.Mounjaro vs. Ozempic: Results
What are the differences in weight loss results between Ozempic and Mounjaro?Ozempic
Multiple studies confirm that Ozempic is effective in supporting weight loss in patients with diagnosed obesity and those considered overweight. One study conducted in the United Kingdom in 2021 divided a group of 1,961 people classified as “overweight” into two groups: one that was administered Ozempic and one that was taking a placebo. The study was carried out for 68 weeks and provided results as follows:- People in the semaglutide group lost significantly more weight than those in the placebo group. On average, they lost 14.9% of their body weight compared to 2.4% for the placebo group.
- A much higher percentage of participants achieved substantial weight loss in the semaglutide group. For example, 86.4% lost 5% or more of their body weight compared to only 31.5% in the placebo group.
- Semaglutide also led to a greater improvement in cardiometabolic risk factors and physical functioning compared to placebo.
Mounjaro
Tirzeptide has also been linked to significant weight loss. A study from 2022 that involved 9,873 patients offered the following results:- People taking tirzepatide lost significantly more weight than those in the placebo, GLP-1 receptor agonist (GLP-1 RA), or insulin groups. On average, the weight loss was 9.81 kg for tirzepatide compared to -1.05 kg, -1.93 kg, respectively, for the other groups.
- All three studied doses of tirzepatide (5mg, 10mg, 15mg) led to significant weight loss compared to placebo/GLP-1 RA/insulin.
Mounjaro vs Ozempic – Weight Loss Comparison
Which of the two drugs offers more pronounced weight loss results? A study from 2023 compared tirzepatide and semaglutide and found that:- People taking tirzepatide were significantly more likely to achieve substantial weight loss compared to those on semaglutide. The study found a higher percentage of reaching milestones like 5% (81.8% vs. 64.6%), 10% (62.1% vs. 38.0%), and 15% (42.3% vs. 19.3%) weight loss within a year.
- People on tirzepatide experienced greater weight loss at each time point measured (3 months, 6 months, 12 months) compared to semaglutide.
- There wasn’t a significant difference in the risk of gastrointestinal side effects between the two medications.
Ozempic vs. Mounjaro: Side Effects
Both of those medications have been researched and deemed safe for treating type 2 diabetes in adult patients. Both medications can cause gastrointestinal side effects; however, it’s been proven that Mounjaro may cause them more frequently, including potentially more severe problems.Here is a table comparing common and less-reported potential side effects of Ozempic vs. Mounjaro.
| Side Effect | Ozempic (Semaglutide) | Mounjaro (Tirzepatide) |
| Common | ||
| Nausea | Yes | Yes |
| Vomiting | Yes | Yes |
| Diarrhea | Yes | Yes |
| Constipation | Yes | Yes |
| Abdominal pain | Yes | Yes |
| Indigestion (upset stomach) | Yes | Yes |
| Gas | Yes | Yes |
| Acid reflux | Yes | Yes |
| Injection site reactions | Yes | Yes |
| Reduced appetite | Yes | Yes |
| Possible, less common | ||
| Severe stomach problems | Uncommon | May be more frequent |
| Serious (seek medical attention immediately) | ||
| Pancreatitis | Uncommon | Uncommon |
Mounjaro vs. Ozempic: Dosage
Both Mounjaro and Ozempic come in prefilled pens for self-injection. These injections are administered once every week. Your doctor will determine the most appropriate starting and maintenance dose for you based on your individual needs and response to the medication. In the majority of cases, patients start with a smaller dosage and gradually increase it, which helps mitigate the risk of side effects.| Medication | Starting Dose | Maintenance Doses | Maximum Dose |
| Mounjaro | 2.5 mg once weekly | 5 mg, 10 mg, or 15 mg once weekly | 15 mg once weekly |
| Ozempic | 0.25 mg once weekly | 0.5 mg, 1 mg, or 2 mg once weekly | 2 mg once weekly |
Mounjaro vs Ozempic: Price
When deciding between the two drugs, the cost is something many patients will consider. Ozempic and Mounjaro can be quite expensive, especially if you’re covering the costs out of pocket. Here’s a useful comparison of their average monthly costs. Mounjaro: $1135 Ozempic: $1029 These costs will vary depending on where you purchase the drugs and the dosage you require. Important Tip 💉 With the growing costs of medications, you might find yourself looking for more affordable alternatives. At Diet Pens, you can find the weight loss medication you need and save up to 80% on brand-name products such as Ozempic or Mounjaro. Our specialized healthcare team of technicians and pharmacists will provide you with the highest level of care, fulfilling your prescription and delivering your medications so you can have full peace of mind! Learn more now.Ozempic vs. Mounjaro: Which One Is For Me?
The choice between Ozempic and Mounjaro should be made in consultation with your medical provider. They will be able to determine which of the two presents more benefits to you. The doctor will consider your medical history, your weight loss goals, side effect tolerance, and other variables. Remember – both Ozempic and Mounjaro are prescription medications, which means you can’t purchase them off the counter. You should always follow your doctor’s recommendations regarding the dosing of the meds and the duration of the treatment.Weight Loss Journey – More Than Medications
No matter whether you administer Ozempic or Mounjaro, drug therapy is only one of the pillars in your weight loss journey. The other one is lifestyle changes that support healthy weight loss. This often includes:- Diet and nutrition: A healthy, balanced diet is the absolute base of any real, sustainable weight loss. It might be difficult to make that transition on your own, therefore, dietician support may prove to be an invaluable resource in creating a new, healthy, balanced meal plan.
- Physical activity: Staying physically active has numerous health benefits. Moderate-intensity activity for just 30 minutes most days of the week can help with weight management.
- Behavioral changes: It’s also essential to focus on underlying issues, such as emotional and behavioral problems that might be the cause of or contribute to weight gain. Consultation with a therapist or weight management counselor is usually recommended.
