Mounjaro vs Ozempic: Comparing GLP-1 Medications for Weight Loss

Mounjaro and Ozempic are both once-weekly injectable medications that can reduce appetite and support weight loss. However, they work differently. Ozempic contains semaglutide, which targets GLP-1 receptors, while Mounjaro contains tirzepatide, which targets both GLP-1 and GIP receptors. [3] [4]

Although Mounjaro and Ozempic are often associated with weight loss, both are approved to treat type 2 diabetes. Their active ingredients are also available in medications specifically approved for chronic weight management in Canada. Semaglutide is sold for weight management as Wegovy, while tirzepatide is sold as Zepbound. Healthcare providers may also prescribe Ozempic or Mounjaro off-label for weight management when they determine it is appropriate.

When comparing Ozempic vs Mounjaro for weight loss, studies suggest that tirzepatide may lead to greater average weight loss than semaglutide. [1] However, the medication that is right for you depends on more than the number on the scale. Your health history, current medications, side effects, treatment goals, insurance coverage, and how you respond to treatment can all matter.

This article compares Mounjaro weight loss and Ozempic weight loss, including how each medication works, weight loss results, dosing, side effects, and what to consider when choosing a treatment in Canada.

How Does Mounjaro Work for Weight Loss?

Mounjaro contains tirzepatide, which activates both GIP and GLP-1 receptors. [3]

These hormones are involved in blood sugar regulation and appetite. Tirzepatide increases insulin release when blood sugar is high, lowers glucagon levels, and is associated with reduced food intake. [3]

For people using Mounjaro for weight loss, reduced appetite and food intake can make it easier to eat less over time.

Mounjaro also slows digestion, which means food moves through the stomach more slowly. This can help you feel full for longer, although it can also contribute to digestive side effects. [3]

Mounjaro is approved in Canada only for type 2 diabetes. When it is used specifically for weight loss, that use is off-label. [3]

How Does Ozempic Work for Weight Loss?

Ozempic contains semaglutide, a GLP-1 receptor agonist. [4]

GLP-1 is a hormone naturally produced in the body. Semaglutide acts on the same receptor and helps regulate insulin and glucagon when blood sugar changes. It also slows stomach emptying. [4]

Ozempic may also reduce appetite and food intake, which is why some healthcare providers prescribe Ozempic for weight loss when they decide it is appropriate. In Canada, Ozempic may be prescribed off-label for weight management. [2]

You can learn more about this medication class in How Do GLP-1 Medications Work for Weight Loss?

Mounjaro vs Ozempic Weight Loss Results

When comparing Ozempic vs Mounjaro for weight loss, tirzepatide was associated with greater weight loss than semaglutide in adults who were overweight or had obesity. [1]

People taking tirzepatide were also more likely to reach larger weight loss milestones within one year:

• 5% or more weight loss: 81.8% with tirzepatide vs 66.5% with semaglutide
• 10% or more weight loss: 62.1% vs 37.1%
• 15% or more weight loss: 42.3% vs 18.1% [1]

These results suggest that Mounjaro weight loss may be greater than Ozempic weight loss for some people, but individual results can vary.

Mounjaro vs Ozempic Dosing

Mounjaro and Ozempic are both taken once a week, but they do not follow the same dosing schedule. [3] [4]

Mounjaro Dosing

Mounjaro treatment starts at a low dose that is increased gradually over time, depending on how your body responds. [3]

Mounjaro typically starts at 2.5 mg once weekly. After four weeks, the dose increases to 5 mg once weekly. [3]

If more treatment effect is needed, the dose may be increased by 2.5 mg at a time after spending at least four weeks on the current dose. The maximum recommended Mounjaro dose is 15 mg once weekly. Your provider sets your starting dose based on your health profile and will advise you on if and when to adjust it. [3]

Ozempic Dosing

Ozempic usually starts at 0.25 mg once weekly. After four weeks, the dose increases to 0.5 mg. [4]

If needed, the dose may later be increased to 1 mg and then 2 mg once weekly. The maximum recommended Ozempic dose is 2 mg per week. [4]

Starting at a lower dose and increasing gradually can help the body adjust to treatment. Follow the schedule provided by your healthcare provider rather than increasing the dose on your own.

Mounjaro vs Ozempic Cost in Canada

The cost of Mounjaro and Ozempic can vary depending on the pharmacy, dose, insurance coverage, and whether a lower-cost version is available.

Ozempic pricing in Canada has changed with the introduction of generic semaglutide. Generic versions became available in 2026 and may cost less than brand-name Ozempic. [5]

Mounjaro does not currently have the same generic pricing situation, so the out-of-pocket difference between the two medications may be significant for some patients.

Insurance coverage also depends on your plan and on how the medication is prescribed. Some plans may require prior authorization or only provide coverage for specific medical uses.

Read How Much Does Ozempic Cost in Canada? for a more detailed look at Ozempic pricing and insurance.

Can You Get Mounjaro or Ozempic Online in Canada?

Yes, the consultation and prescription process can be completed online through a telemedicine provider.

With TreatMeNow, getting prescription weight loss medication in Canada starts with an online questionnaire. You provide information about your treatment goals, height and weight, medical history, medications, and allergies. A licensed healthcare professional reviews your answers and may prescribe a weight loss medication if you are eligible.

If treatment is prescribed, the medication can be filled by a licensed pharmacy and delivered to your home.

Online treatment does not mean automatic approval. The provider will decide whether Mounjaro, Ozempic, or another treatment is appropriate based on your health information.

Conclusion

When comparing Mounjaro vs Ozempic for weight loss, Mounjaro may offer greater average weight loss for some people, while Ozempic may be a better fit for others.

The decision is not only about which medication produced more weight loss in a study. Cost, insurance, side effects, your medical history, and how your body responds to treatment can all affect which option makes sense.

A licensed healthcare provider can review these factors and help you choose a treatment based on your individual needs. Through TreatMeNow, you can complete an online assessment to find out whether Mounjaro, Ozempic, or another treatment may be appropriate.

You can also visit the TreatMeNow weight loss blog to learn more about GLP-1 medications, weight loss treatment options, and what to expect during treatment.

FAQ: How Do I Choose Between Mounjaro and Ozempic for Weight Loss?

Choosing between Mounjaro and Ozempic should be done with a healthcare provider who can review your health history, treatment goals, side effect risk, insurance coverage, and budget. Mounjaro may lead to greater average weight loss for some patients, but that does not automatically make it the better choice for everyone. Ozempic may be more familiar to some providers, may have different coverage considerations, and may cost less for some patients now that generic semaglutide is available in Canada.

The right option depends on how your body responds to treatment and whether the medication fits safely into your overall health plan. Cost can also play a major role, especially if your insurance plan covers one medication differently than the other.

Before choosing between Mounjaro and Ozempic:

1. Talk to your healthcare provider to decide the more appropriate medication.
2. Check if you have any medical conditions that make either treatment unsafe.
3. Ask about the expected weight loss results.
4. Determine the differences in cost, with and without insurance.
5. Ask your provider if generic semaglutide is a viable option
6. Map out your next steps if you experience side effects
7. Monitor your progress and check in with your healthcare provider