Saxenda vs Ozempic For Weight Loss: A Surgeon’s Deep Dive

As a bariatric surgeon who’s walked the challenging path of weight loss personally, including undergoing weight loss surgery, I’ve explored the gamut of options - and yes, that includes weight loss meds like Ozempic and Saxenda.     If you’re digging into the Saxenda vs. Ozempic debate, you’re probably weighing your options on the weight loss front. In this article I’ll dissect the ins and outs of both, highlighting their similarities, differences and why, in the end, neither might be the silver bullet you’re hoping for. I’ll also share why I decided to have sleeve surgery myself, and why I feel it stands out as the best solution for tackling obesity for the long-term.  

Saxenda vs. Ozempic® — A Comparison  

Key Takeaways

Saxenda and Ozempic Comparison: While both Saxenda and Ozempic hail from the GLP-1 receptor agonist family and have some overlapping side effects, they vary in their dosing frequency, potency, primary usage, and long-term health effects.  

Not Magic Bullets: Both medications, though helpful, are often not the magic solution people hope for. They come with their own set of benefits and risks, and their efficacy is heightened when combined with a healthy diet, and lifestyle changes.  

Superiority of Sleeve Surgery: For those seeking substantial, sustainable, and life-transforming weight loss, weight loss surgery, including sleeve surgery, has shown to be more effective and lasting than weight loss medications.  

Weight Loss Medication in Canada

In Canada there is a host of weight-loss medications.↗ But it's essential to take a discerning view, as no medication is a silver bullet. Some are crafted to reduce your appetite, some prevent fat absorption, while others are not even specifically categorized as weight-loss drugs but have found off-label use in this realm.  

A Snapshot of Weight-Loss Medications:  

• Bupropion/naltrexone (Contrave): Primarily designed to curb your cravings.    
• Liraglutide (Saxenda): This is a daily shot. It’s geared to help control the quantity of food you consume.  
• Orlistat (Xenical): The modus operandi of Orlistat is inhibiting the absorption of fats.    
• Semaglutide (Ozempic): Not strictly a weight-loss medication, Ozempic is sometimes prescribed off-label for those seeking weight reduction.  

Purpose Behind Prescribing Weight-Loss Medicines:  

If you're overweight or obese, and simultaneously juggling other health issues such as diabetes or high blood pressure, your doctor might point you in the direction of these medicines. These drugs are an adjunct to the practices of a balanced diet and regular physical activity.  

Side Effects – A Reality Check:  

No drug is free from side effects. Common ones include nausea, headaches, heartburn, indigestion, vomiting, and constipation. For instance, both Contrave and Saxenda users have reported nausea.     The data suggests that the many patients often discontinue these weight-loss medications↗ due to side effects, cost and weight loss plateaus.     In a Nutshell: For many people, Medication alone is often not the  holistic solution that they were looking for.  It can also come with costs - both financial and side effects.     If you’re looking to lose a life-changing amount of weight and keep that weight off, it might be time to look into weight loss surgery like sleeve surgery.  

Saxenda For Weight Loss

What is Saxenda?  

Saxenda↗, or its generic name Liraglutide, is a prescription weight-loss drug in Canada.     Saxenda (liraglutide) is primarily approved for weight management in adults and some pediatric patients aged 12 and older who have a certain initial body weight and suffer from weight-related conditions such as hypertension, type 2 diabetes, or dyslipidemia. It's used alongside a reduced-calorie diet and increased physical activity.

How It Works:  

Liraglutide (in Saxenda) mirrors a naturally occurring hormone in our gut called GLP-1 (glucagon-like peptide 1). When we eat, this hormone is released, signaling our brain about fullness and ensuring appropriate insulin production. By mimicking this hormone, Saxenda amplifies feelings of fullness, making one eat less, which, when coupled with a healthy lifestyle, can lead to weight loss.  

Personal Insights:    

Being on Saxenda is a bit like having an internal regulator. When I took it, I felt the hunger pangs somewhat dimming. But remember, it’s not like flipping an off-switch. Hunger doesn’t vanish, but the edge is taken off. The incessant need to snack or indulge in larger portions becomes a bit easier to manage. It's like having a backseat driver telling you to slow down at the food buffet. Unfortunately, these effects diminished for me over time.  

Ozempic For Weight Loss

What is Ozempic?  

Ozempic↗, with the generic name Semaglutide, is primarily designed to treat type 2 diabetes by regulating blood sugar levels. However, its off-label use for weight loss has caught significant attention.   It can improve blood sugar levels alongside diet and exercise. However, weight loss can be a beneficial side effect due to its mechanism of action. It's worth noting that semaglutide is also marketed under the name Wegovy for weight management, specifically.

How It Works:  

Ozempic belongs to a class of medications known as GLP-1 (glucagon-like peptide 1) receptor agonists. Its job is twofold: First, it amplifies the amount of insulin released post-meal, ensuring sugars in the blood are adequately used. Second, it mimics a gastrointestinal hormone, signaling the body about fullness and digestion. This double-action not only helps in managing diabetes but also impacts appetite, making users consume fewer calories by also slowing down gastric emptying  

Personal Insights:    

When I’ve taken Ozempic, the feeling wasn’t that of a drastic appetite annihilation. Instead, the urge to eat, especially after being full, was subtly suppressed. However, it’s critical to clarify that the lure of food doesn’t vanish into thin air. Even though the constant 'need' to eat reduces, there's still a lingering 'want'. It’s like having your car's accelerator slightly jammed - you can still speed, but it’s going to take a bit more effort. The effects wane with time.  

Saxenda vs. Ozempic For Weight Loss: A comprehensive comparison    

At first glance, Saxenda and Ozempic might seem like twins in the world of weight loss medications. They both belong to the GLP-1 receptor↗ agonist family, and they've both been lauded for their efficacy in promoting weight loss.     But dig a little deeper, and differences emerge.   Common Side Effects: Both Saxenda and Ozempic have overlapping side effects↗ such as:

NauseaDiarrheaConstipationHeadacheVomiting  

However, the severity and frequency of these side effects can vary among users. While some side effects are mere annoyances, others can be more serious. For example, Ozempic has been associated with an elevated risk of pancreatitis, while Saxenda can increase the likelihood of hypoglycemia. It's paramount to promptly report any side effects and strictly follow the guidance of a healthcare provider.  

Saxenda vs. Ozempic Key Differences:

While Saxenda is approved for chronic weight management,  Ozempic is approved for Type 2 diabetes

Dosing Frequency: Saxenda is administered once daily, while Ozempic is a weekly affair.Active Ingredient: Saxenda has liraglutide, and Ozempic boasts semaglutide.Potency: Ozempic, being a more potent GLP-1 receptor agonist, exhibits a stronger effect on appetite regulation than Saxenda.Administration: Both are self-injected, but the dosing specifics might differ.  

In the end, neither of these medications should be perceived as magic bullets. They are designed for use alongside sustainable lifestyle changes.     Also read - Ozempic vs. Contrave Comparision

Why do some people prefer to use saxenda over Ozempic?

Both medications work by mimicking the action of GLP-1 (glucagon-like peptide-1), a hormone that helps regulate blood sugar and appetite. However, the difference in formulation might lead to a preference for one over the other due to individual responses or the perceived effectiveness in managing either blood sugar or weight, or both. Availability, insurance coverage, and cost can also play a significant role in choosing between Saxenda and Ozempic. Depending on the patient's health insurance plan, one medication might be more financially accessible than the other. The choice might also depend on the individual's health goals (e.g., weight loss versus blood sugar control) and their medical history. For someone primarily focused on weight management without type 2 diabetes, Saxenda might be the preferred option. Conversely, Ozempic might be chosen by patients who are primarily looking to manage their type 2 diabetes but also benefit from the weight loss side effect.

What If Neither One Is Working For You?

Some people do well on liraglutide. Some do better on semaglutide. And some people take one, then the other, follow the dosing schedule closely, and find that the scale barely moves — or moves for a few months and then stops.

If that is where you are, the most useful thing to understand is that it is not a character problem. Body weight is defended by biology that pushes back hard against weight loss, and it pushes back differently in different people. A medication that works well for a friend or a family member may do very little for you, and the reverse is equally true. That variation is expected. It is one of the reasons the Canadian Adult Obesity Clinical Practice Guidelines↗ treat obesity as a chronic medical condition rather than a matter of effort or discipline, and one of the reasons the 2025 pharmacotherapy update to those guidelines↗ places medication inside long-term management rather than a short course.

So the question is not what went wrong with you. The question is what to look at next.

Start with the person who prescribed it

Before treating medication as a closed door, the next conversation belongs with your prescriber. They have the two things a comparison of two drugs cannot supply: your full history, and the ability to act on it.

Questions worth bringing to that appointment:

• How long should we stay at this dose before deciding it is not doing enough?
• Is there a reason to try something else — a different medication in this class, or a different class altogether?
• Could any of my other medications or conditions be working against this?
• What would a realistic result look like for someone with my history?

How long to stay at a dose before judging it, and whether to move to another medication in the same class or out of it, are decisions of exactly that kind. They depend on your health history, what you have already tried, and how you tolerated it — which is why they sit with the clinician who knows all three, and why no general answer to them is worth much. If there is no longer anyone managing this for you — the medication was stopped some time ago, or the prescribing relationship has ended — The Sleeve Clinic prescribes and co-manages weight-loss medication as well as performing surgery, and can pick that conversation up.

Where surgery fits, and where it doesn't

Bariatric surgery is one of the options that comes onto the table when medication has not delivered what you and your prescriber were aiming for. It is not the automatic next step, and it is not right for everyone.

It is worth being precise about why it is different rather than simply stronger. Surgery changes the anatomy of the stomach and, with it, some of the hormonal signalling involved in hunger and fullness. That is a different mechanism from a weekly or daily injection, and it comes with a different set of trade-offs: an operation and an anaesthetic, a recovery period, permanent changes to how and how much you eat, lifelong vitamin supplementation, ongoing blood work, and long-term follow-up. Outcomes vary between people here too.

Some people are better served by staying on medication and adjusting it. Some are better served by surgery. Some end up doing both at different points. Which of those applies to you is a clinical assessment, not something that can be settled by comparing two drug labels.

If you have already lost weight on a GLP-1, that assessment does not run off today's number alone. It takes in your current BMI, the highest BMI you have documented, and the trajectory across the two.

The clinic sets the two paths against each other in more detail in how weight-loss medication and bariatric surgery actually compare, and describes the operation itself in what the gastric sleeve involves.

One question comes up early enough to answer here: what happens to the medication if surgery does go ahead. Being assessed is not in itself a reason to change what you are taking — that decision stays with the prescriber managing it. An operation is different. The Sleeve Clinic asks its patients to stop the GLP-1 at least two weeks before the surgery date, and that instruction comes from the surgical team once a date is set. You may come across less strict advice elsewhere; the clinic's own instruction is more cautious, and it is the one that applies to patients operated on here.

One practical note for readers in Ontario: bariatric surgery at The Sleeve Clinic is private-pay. It is not covered by OHIP. That is a separate funding question from whether your drug plan covers liraglutide or semaglutide, and it is worth separating early rather than late. Pricing and financing sit on their own page.

If your medication is working, that is a real outcome

Plenty of people reading a comparison page are doing perfectly well on what they are taking. If liraglutide or semaglutide is working for you and you tolerate it, there is no reason to treat that as a waiting room for an operation. Continuing effective medical treatment is a legitimate long-term answer, not a lesser one.

If that picture changes later, or the question of adding or switching to something else comes up, it gets reviewed with whoever is prescribing for you at the time.

Saxenda vs. Ozempic: In conclusion:

When weighing the options between Saxenda and Ozempic, it's essential to dive deep into their makeup, effects, and potential outcomes.   Both medications, albeit with their respective merits, primarily operate by influencing appetite and have shown promising results in the weight loss realm.     However, they come with their own sets of side effects, and their results might not be the long-term solution many seek.     For those aiming to achieve transformative and sustained weight loss, the compass often points beyond temporary medicinal aids. Consider looking into weight loss surgery, like sleeve surgery, which has consistently proven to be a more impactful and lasting approach.   If you’re thinking about sleeve surgery, here’s some next steps to take:

Evaluate your eligibility: Take a quick online quiz to see if you qualify for sleeve surgery – How Much Will I lose After Sleeve Surgery? Calculate weight lossSeek expert advice: Speak with a Sleeve Clinic Program Advisor Become part of our community: Follow The Sleeve Clinic on Instagram↗ 

Please note that the information provided in this article is for general informational purposes only and should not replace medical advice. It is always recommended to consult with a qualified healthcare professional for personalized guidance regarding weight loss surgery. If you are considering sleeve surgery you can book a consultation with our weight loss clinic here: Contact us! 

References  

• Obesity Canada - Prescription Medications↗
• HealthLinkBC - Weight-Loss Medicines↗
• Diabetes Canada - Pharmacologic Glycemic Management of Type 2 Diabetes in Adults↗
• CTV News - Health Canada Reviews Reports on Recalled Diet Pill↗

Common Questions About Saxenda and Ozempic

Is Saxenda the same as Ozempic?

No. Both are GLP-1 receptor agonists, so they act on the same hormone pathway, but they are different molecules — liraglutide in Saxenda, semaglutide in Ozempic — taken on different schedules, daily versus weekly. They also differ in what they are authorized to treat in Canada, which is part of why one may be available to you and the other may not; Health Canada's Drug Product Database↗ records the authorized indication for each.

Do Saxenda and Ozempic have the same side effects?

The side-effect profiles overlap a great deal, because both act through the same pathway. Gastrointestinal effects are the ones most commonly reported for both. What tends to differ between people is tolerability rather than the list itself: some find one easier to stay on than the other, and the daily-versus-weekly schedule can be part of that. Neither is categorically gentler than the other. Side effects that persist, worsen, or feel severe are a reason to contact your prescriber rather than push through.

Which one is better for weight loss?

There is no answer to that question that holds for everyone, which is why it is worth replacing with a better one. The useful questions are which medication is a reasonable fit for your health history, which one your prescriber can actually access and prescribe for you, and how well you tolerate it once you are on it. Response varies enough between individuals that a ranking in the abstract does not tell you much about your own result.

What if I have tried both and neither worked?

That happens, and it is a treatment-response question rather than a personal one. The next step is a conversation about what else is available — with the prescriber managing your medication, or with The Sleeve Clinic, which prescribes and co-manages weight-loss medication alongside the surgical side of its practice. Whether surgery is worth assessing in your case is a separate question, and it does not have to be the one you answer first. If what you are describing is appetite suppression fading rather than a medication that never worked, that has a page of its own on when a GLP-1 stops suppressing appetite. If the prior question is simply whether you would be a candidate for bariatric surgery, that can be checked before anything else.

Before you act on any of this

What is written here is general education, not medical advice for an individual, and it cannot replace an assessment by a clinician who knows your history. Decisions about starting, changing, or stopping a weight-loss medication belong with the prescriber managing it. Any symptom that is severe, that keeps going, or that worries you is a reason to contact your healthcare provider rather than wait it out, and the patient information supplied with your medication sets out the specific symptoms its manufacturer asks you to report. If you are unwell enough to be unsure, seek urgent care.

The Sleeve Clinic sees patients in Mississauga and Toronto, and virtually elsewhere in Canada. Surgery is part of what it does, and so is prescribing and co-managing weight-loss medication — a consultation can be about getting the medical treatment right rather than about booking an operation. The first conversation is a free call of about 15 to 20 minutes, and it is with Mandy, the clinic's program advisor, rather than with the surgeon; the clinic's own description of it is zero pressure, no commitment. If you would rather start without speaking to anyone, there is a short questionnaire on the site that takes under two minutes to check whether you qualify. If you want to work out where medication or surgery fits alongside what you are already doing, that is a reasonable conversation to start — book a consultation.

Written and reviewed by Dr. Scott Gmora, MD FRCSC FACS.