Semaglutide and Tirzepatide are FDA-approved GLP-1 injectable medications that help patients lose 15–22% of their body weight. Semaglutide (the active ingredient in Ozempic/Wegovy) targets one hormone pathway, while Tirzepatide (Mounjaro/Zepbound) targets two — potentially producing greater weight loss. Both are once-weekly injections with similar side effect profiles.
Here’s a detailed comparison to help you choose the right one.
How Semaglutide Works
Semaglutide is a GLP-1 receptor agonist. It mimics a natural hormone called GLP-1 that your body produces after eating. This hormone:
- Slows gastric emptying — food stays in your stomach longer, so you feel full faster
- Reduces appetite — the signals that drive hunger and cravings are dialed down
- Improves blood sugar regulation — which is why it was originally developed for type 2 diabetes
In the STEP clinical trials (New England Journal of Medicine, 2021), patients on Semaglutide lost an average of 15% of their body weight.
How Tirzepatide Works
Tirzepatide takes things a step further. It’s a dual GIP and GLP-1 receptor agonist — meaning it activates two hormone pathways instead of one:
- GLP-1 — the same appetite-suppressing, blood sugar–regulating hormone that Semaglutide targets
- GIP (glucose-dependent insulinotropic polypeptide) — an additional hormone that enhances insulin secretion and may improve fat metabolism
By working on both pathways, Tirzepatide may provide enhanced results for some patients. In the SURMOUNT-1 trial (New England Journal of Medicine, 2022), patients on the highest doses lost an average of 21–22.5% of body weight — with results ranging from 16% to 22.5% depending on dose.
Side-by-Side Comparison
| Semaglutide | Tirzepatide | |
|---|---|---|
| Mechanism | GLP-1 agonist | Dual GIP + GLP-1 agonist |
| Average weight loss | ~15% body weight | 16–22.5% body weight (dose-dependent) |
| Injection frequency | Once weekly | Once weekly |
| Common side effects | Nausea, especially early on | Nausea, especially early on |
| Originally approved for | Type 2 diabetes (Ozempic), weight loss (Wegovy) | Type 2 diabetes (Mounjaro), weight loss (Zepbound) |
Which One Should You Choose?
There’s no single “better” medication — the right choice depends on your body, your goals, and your budget. Here are some general guidelines:
Semaglutide may be a great starting point if:
- You’re new to GLP-1 medications
- You want the most affordable option (our program starts at just $50)
- You have 20–50 pounds to lose
- You want a well-established medication with years of clinical data
Tirzepatide may be worth considering if:
- You have more significant weight to lose
- You’ve tried Semaglutide and plateaued
- You have type 2 diabetes or insulin resistance
- You want the maximum clinical weight loss potential
What About Side Effects?
Both medications share similar side effects, most commonly:
- Mild nausea (especially in the first 2–4 weeks)
- Decreased appetite (this is actually how the medications work)
- Occasional constipation or diarrhea
We minimize these effects by starting at a low dose and gradually increasing over several weeks. Most patients find that side effects improve significantly after the first month.
Cost and Insurance
At Southern Comfort Pain & Wellness, we use compounded versions of these medications, which keeps costs dramatically lower than brand-name options:
- Semaglutide starts at $50
- Tirzepatide pricing varies — contact our office for current rates
No insurance is required. No prior authorizations. No pharmacy back-and-forth.
Our Approach to Weight Loss
We’re a pain management practice first — and we see the connection between weight and chronic pain every day. Excess weight puts stress on joints, worsens back pain, and limits mobility. Many of our patients start a weight loss program and find that their pain improves along with their weight. B-12 injections can also complement your weight loss journey by supporting energy and metabolism.
During your first visit, your provider will:
- Review your medical history and current medications
- Check your BMI and discuss your goals
- Recommend the medication that’s the best fit for you
- Start your first injection that same day (if appropriate)
You’ll have ongoing follow-ups to monitor your progress, adjust your dose, and make sure you’re on track.
The Bottom Line
Both Semaglutide and Tirzepatide are effective, evidence-based weight loss medications. The best one for you depends on your individual situation — and that’s exactly what we’re here to help you figure out.
Ready to get started? Request an appointment or call 678-587-5993. Learn more about our medical weight loss program.
About the Author
Tiaya Welsh is a board-certified Family Nurse Practitioner with over 23 years of community healthcare experience, including 8 years in orthopedics and 7 years as an ER nurse. She earned her BSN from Brenau University and her MSN from Kennesaw State University. She specializes in pain management and wellness at Southern Comfort Pain & Wellness.