Ozempic and Wegovy both contain semaglutide. Mounjaro and Zepbound both contain tirzepatide. The main difference within each pair is the FDA-approved use: Ozempic and Mounjaro are approved for type 2 diabetes, while Wegovy and Zepbound are approved for chronic weight management. All four are once-weekly injections, and all require a prescription and medical follow-up.
Quick comparison
| Brand | Active ingredient | How it works | FDA-approved for | Dosing |
|---|---|---|---|---|
| Ozempic | Semaglutide | GLP-1 receptor agonist | Type 2 diabetes (blood sugar control; cardiovascular and kidney risk reduction in certain adults) | Weekly injection |
| Wegovy | Semaglutide | GLP-1 receptor agonist | Chronic weight management; reducing cardiovascular risk in adults with heart disease and excess weight | Weekly injection |
| Mounjaro | Tirzepatide | GIP and GLP-1 receptor agonist | Type 2 diabetes | Weekly injection |
| Zepbound | Tirzepatide | GIP and GLP-1 receptor agonist | Chronic weight management; moderate-to-severe obstructive sleep apnea in adults with obesity | Weekly injection |
What is the difference between semaglutide and tirzepatide?
Semaglutide acts on one hormone pathway, GLP-1. Tirzepatide acts on two, GLP-1 and GIP. Both slow stomach emptying, increase fullness and help the body release insulin when blood sugar is high. In head-to-head research, tirzepatide produced greater average weight loss than semaglutide, but individual results vary and the better medication for you depends on your health history, tolerance and coverage.
Is Ozempic the same as Wegovy?
They contain the same medicine, but they are approved for different purposes and come in different dose ranges. Wegovy reaches a higher maintenance dose for weight management. Your clinician chooses the product based on your diagnosis, not just the ingredient.
Who may qualify for a weight-management GLP-1?
Under FDA labeling, Wegovy and Zepbound are generally used for adults with a body mass index (BMI) of 30 or higher, or 27 or higher with at least one weight-related condition such as high blood pressure, type 2 diabetes or high cholesterol. They are used alongside a reduced-calorie diet and increased physical activity.
These medications are not right for everyone. They carry a boxed warning about thyroid C-cell tumors seen in animal studies and should not be used by people with a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2. Tell your clinician if you are pregnant or planning pregnancy, or have a history of pancreatitis, gallbladder disease or kidney problems.
What side effects are common?
The most common side effects are nausea, diarrhea, vomiting, constipation and stomach discomfort, especially when starting or increasing the dose. Doses are increased gradually to help. See our guide to GLP-1 side effects and when to call your doctor for warning signs.
What about compounded or online versions?
The FDA has warned about risks from unapproved and some compounded semaglutide and tirzepatide products, including dosing errors. Ask where your medication comes from and get it through a licensed pharmacy with a prescription from a clinician who follows up with you.
How Voss Family Clinic approaches GLP-1 care
At our Sugar Land clinic, a visit starts with your health history, current medications, weight-related conditions and lab work where needed. If a GLP-1 medication is appropriate, we explain the options, check coverage requirements with you, and schedule regular follow-up visits to adjust the dose and manage side effects. Medication is one part of a plan that also covers nutrition, activity and sleep.
Learn more about our medical weight loss program, or read how weight loss injections work and why diet and exercise alone may not be enough.
Frequently asked questions
Can I switch from Ozempic to Zepbound?
Switching is possible but should be planned by your clinician, who will decide the starting dose and timing based on your current dose and how you tolerated it.
Will insurance cover these medications?
Coverage varies widely by plan and diagnosis. Diabetes-labeled medications are more often covered for type 2 diabetes than weight-management medications are for weight loss. Our office can help you check your plan’s requirements.
Do I have to stay on the medication?
Studies show many people regain weight after stopping. Your clinician will discuss a long-term plan, including whether and how to taper.
Ready to talk about your options? Request a weight-loss consultation with our Sugar Land team.
Medical Disclaimer: The information in this article is provided for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Consult a qualified healthcare professional regarding your individual health concerns. If you are experiencing a medical emergency, call 911 or seek emergency medical care.
Sources
- FDA prescribing information for Ozempic, Wegovy, Mounjaro and Zepbound
- FDA: Medications containing semaglutide and tirzepatide marketed for type 2 diabetes or weight loss
- Aronne LJ et al. Tirzepatide as compared with semaglutide for the treatment of obesity. N Engl J Med. 2025.