Semaglutide vs Tirzepatide: Which Weight Loss Medication Is Right for You?
Semaglutide and tirzepatide are the two most widely used injectable weight loss medications. Both are taken weekly and both reduce appetite, but they work differently and have different trial results. This guide compares them so you can have an informed conversation with your clinician.
Important safety information. This page is general education, not medical advice. Only a licensed clinician who knows your history can decide whether a medication is right for you. Do not start, stop or change a prescription without talking to your clinician. If you have severe abdominal pain, trouble breathing, swelling of the face or throat, or thoughts of harming yourself, seek emergency care or call 988.
Side-by-Side Overview
| Feature | Semaglutide | Tirzepatide |
|---|---|---|
| How it works | Activates GLP-1 receptors | Activates GLP-1 and GIP receptors |
| Weight-loss brand | Wegovy | Zepbound |
| How it is taken | Weekly injection (a daily pill form is also available) | Weekly injection |
| Maintenance dose | 2.4 mg weekly (injection) | 5, 10 or 15 mg weekly |
| Boxed warning | Thyroid C-cell tumors (animal studies) | Thyroid C-cell tumors (animal studies) |
What the Research Shows
In the SURMOUNT-5 head-to-head trial in adults with obesity, tirzepatide produced an average weight loss of about 20% over 72 weeks, compared with about 14% for semaglutide. Individual results vary widely, and the best medication for you also depends on side effects, other health conditions, cost and coverage.
Side Effects
The most common side effects of both medications are stomach-related: nausea, diarrhea, vomiting and constipation, mostly during dose increases. Both carry a boxed warning for thyroid C-cell tumors seen in animals and are not for people with a personal or family history of medullary thyroid carcinoma or MEN 2. Tirzepatide can reduce the effectiveness of oral birth control pills.
How to Decide
- Your health history: heart disease, sleep apnea, liver disease or diabetes may favor one option.
- Your goals: how much weight you want to lose and how fast.
- Tolerability: how you respond to dose increases.
- Cost and coverage: insurance rules and cash-pay options differ. See our medication cost guide.
Frequently Asked Questions
Is tirzepatide stronger than semaglutide?
In head-to-head research, average weight loss was higher with tirzepatide. That does not mean it is better for every person.
Can I switch from one to the other?
Some people switch under clinician guidance. Do not combine them or change doses on your own.
Which one is covered by insurance?
Coverage varies by plan. Check your plan and our Cost & Insurance guides.
How TeleSlim Clinic Can Help
A TeleSlim Clinic physician can review your health history and goals by secure video visit and discuss whether prescription weight loss treatment is appropriate for you. Prescribing is always at the clinician's discretion, and not every medication is right for every person. See our Cost & Insurance guides and Illinois locations.
Cost & Insurance guides
TeleSlim Clinic visits are self-pay, and we do not bill insurance for our own services. We do handle prior authorization for your medication, provide a superbill you can submit to your insurance for possible reimbursement, and send your medication and lab orders to the pharmacy or lab you choose, where your insurance can be used. We do not see patients with Medicare.
- Weight Loss Medication Cost in Illinois
- Insurance and Weight Loss Medication in Illinois
- Illinois Medicaid and Weight Loss Medication
- TeleSlim Clinic Pricing and Plans
- HSA and FSA for Weight Loss Treatment
- Cash-Pay vs. Insurance for Weight Loss Treatment
- Blue Cross Blue Shield of Illinois and Weight Loss Medication
- Illinois State Employee Plan and Weight Loss Medication
- When Your Employer Plan Excludes Weight Loss Drugs
- Prior Authorization and Appeals for Weight Loss Medication
- Self-Pay Weight Loss Medication and Compounded Drugs
- What to Ask Your Insurance About Weight Loss Medication
Medications & Decision Guides
Learn about the prescription options and how to choose:
Weight Loss Guides by Health Condition
- PCOS and Weight Loss
- Prediabetes and Weight Loss
- Menopause Weight Gain
- Weight Regain After Bariatric Surgery
- Sleep Apnea and Weight Loss Medication
- Blood Pressure and Heart Health
- Fatty Liver and Weight Loss
- Hypothyroidism and Weight Loss
- Antidepressants and Weight
- Binge and Emotional Eating
- Weight Loss After 50
More in This Library
- Wegovy vs Zepbound
- Telehealth vs In-Person Care
- Medication vs Bariatric Surgery
- How to Choose a Medication
Cost, Coverage and Illinois Care
- Weight Loss Medication Cost in Illinois
- Does Insurance Cover Weight Loss Medication?
- Illinois Medicaid and Weight Loss Medication
- TeleSlim Clinic Pricing and Plans
- HSA/FSA and Weight Loss Medication
- Cash Pay vs Insurance
TeleSlim Clinic serves patients across Illinois, including Naperville, Aurora, Joliet, Evanston, Peoria, Springfield, Champaign, Schaumburg, Oak Lawn. See all Illinois locations.
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If you are considering bariatric surgery, learn about surgical options with Dr. Jihad Kudsi at DoctorKudsi.com (https://www.doctorkudsi.com).
Sources: FDA prescribing information for Wegovy and Zepbound; SURMOUNT-5 trial, New England Journal of Medicine 2025.
This page is general information, not medical advice. Prescribing information changes; confirm current details with your clinician or pharmacist. Last updated: October 7, 2026.