Authored by:
Sergey Terushkin, MD, FACS, FASMBS, DABOM, DABS-FPMBS
In the ever-evolving landscape of medical weight management, new and effective tools are constantly emerging, offering hope and tangible results for my patients. As a bariatric surgeon with over a decade of experience, I’ve seen firsthand how powerful these medications can be when integrated into a comprehensive, physician-supervised plan. Two of the most talked-about injectable medications right now are Mounjaro (tirzepatide) and Saxenda (liraglutide).
Many patients at the Florida Surgery & Weight Loss Center ask me, “Dr. Terushkin, what’s the difference between Mounjaro and Saxenda? Which one is better for me?”
It’s a critical question. While both are practical tools for weight loss, they are not the same. Understanding their unique mechanisms, effectiveness, and how they fit into a personalized health journey is key. Let’s break down the comparison.
The primary difference between Mounjaro and Saxenda lies in their biological mechanism. Both medications mimic hormones produced in your gut that regulate appetite and blood sugar, but they target different receptors.
Think of it this way: if Saxenda is opening one door to appetite control, Mounjaro is opening two doors simultaneously, often leading to a more profound impact.
When we look at the clinical data, the dual-action mechanism of Mounjaro often translates to more significant weight loss results.
The SURMOUNT-1 clinical trial, a landmark study for tirzepatide, showed astonishing results. Participants taking the highest dose of Mounjaro lost, on average, nearly 21% of their body weight over 72 weeks. In mathematical terms, for a person weighing 230 pounds, this could equate to a loss of over 48 pounds.
Let’s represent the average weight loss (WL) as a function of initial body weight (W0) and the percentage loss (PL):
WL=W0×PL
For a 230 lb individual on Mounjaro (where PL≈0.21):
WL=230lbs×0.21≈48.3lbs
Saxenda has also proven to be very effective. In its clinical trials, patients lost an average of 5% to 10% of their body weight. While this is a significant and life-changing amount of weight for many, the head-to-head data generally shows that Mounjaro produces a greater average weight loss percentage.
It’s important to remember that these are averages. At Florida Surgery & Weight Loss Center, we focus on your individual results. Success is not just a number on a scale; it’s about improving your overall health, from blood pressure to mobility and confidence.
Both medications share a similar side effect profile, which is primarily gastrointestinal. This is due to their effect on slowing down digestion. Common side effects include:
In my experience, these side effects are typically most pronounced when starting the medication or increasing the dose, and they tend to subside as your body adjusts. We manage this by starting patients on a low dose and titrating it up slowly.
The most significant lifestyle difference is the dosing schedule. Saxenda is a daily injection, while Mounjaro is a weekly injection. For many of my patients, the convenience of a once-weekly shot is a major advantage, as it can improve adherence and long-term consistency.
Disclaimer: Pricing may vary based on individual response, dosage, program length, and provider recommendations.
These pricing options provide flexibility for patients seeking various durations of treatment.
So, which one is “better”? The answer is always: the one that is better for you.
Factors that we consider when creating your personalized plan include:
At the Florida Surgery & Weight Loss Center, we don’t just prescribe medication. We partner with you. Whether you’re exploring medical weight management, endoscopic procedures, or bariatric surgery like the gastric sleeve, my team and I are committed to providing a plan that is safe, effective, and tailored to your life. With over 10 years of experience and thousands of successful procedures, we use cutting-edge technology and evidence-based medicine to guide you to lasting health.
Q: Is Mounjaro just a newer version of Saxenda?
A: No. While they are in a similar class of medications, Mounjaro (tirzepatide) is a different molecule with a dual-action mechanism (GIP and GLP-1), unlike Saxenda (liraglutide), which is a single GLP-1 agonist. This dual action is why it often leads to more significant weight loss.
Q: Do I have to stay on these medications forever?
A: Obesity is a chronic disease, and these medications are designed for long-term use to manage it effectively. The goal is to use them as a tool to help you establish sustainable lifestyle habits. Discontinuing the medication often leads to regaining some of the lost weight.
Q: Can I switch from Saxenda to Mounjaro?
A: Yes, switching is possible, but it must be done under the supervision of a qualified physician. I would work with you to determine the appropriate timing and dosing schedule to ensure a safe and smooth transition.
Q: Which medication has worse side effects?
A: The side effect profiles are very similar. The severity and type of side effects are highly individual. We manage this with a slow dose escalation schedule and supportive care to minimize discomfort.
Q: Is one medication safer than the other?
A: Both medications have been rigorously tested and approved by the FDA and are considered safe for eligible patients. They carry similar warnings, such as a risk of thyroid C-cell tumors (seen in animal studies). They should not be used by individuals with a personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2).
Dr. Sergey Terushkin, MD, FACS
Compassionate, affordable care for lasting weight loss.
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Disclaimer: This blog post is for informational purposes only and should not be considered medical advice. Always consult your doctor before starting any new medication or changing your treatment plan.
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