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Semaglutide dosage for weight loss in Canada follows a stepwise titration schedule, starting at 0.25 mg once weekly and increasing every four weeks to a maintenance dose of 2.4 mg. This gradual approach minimizes gastrointestinal side effects while allowing your body to adjust. In Canada, semaglutide is available as Wegovy for weight management and Ozempic for type 2 diabetes, though both contain the same active ingredient. The full titration takes about 16 to 20 weeks, and most people begin seeing meaningful weight loss once they reach the 1.0 mg dose or higher.
What Is the Standard Semaglutide Starting Dose for Weight Loss?
The semaglutide starting dose for weight loss is 0.25 mg injected subcutaneously once per week. This low dose is not meant to produce significant weight loss on its own. Instead, it primes your body and reduces the likelihood of nausea, vomiting, or diarrhea. You stay on 0.25 mg for four weeks before moving up.
After four weeks, the dose increases to 0.5 mg weekly. This is still considered a low dose, but some people begin to notice reduced appetite and early satiety. The next step is 1.0 mg weekly, which is the first dose where clinical trials show consistent, measurable weight loss. From there, you can move to 1.7 mg and finally 2.4 mg, the full maintenance dose approved for chronic weight management.
Semaglutide Titration Schedule for Weight Loss in Canada
Here is the standard titration schedule used in Canada for semaglutide weight loss:
- Weeks 1 to 4: 0.25 mg once weekly
- Weeks 5 to 8: 0.5 mg once weekly
- Weeks 9 to 12: 1.0 mg once weekly
- Weeks 13 to 16: 1.7 mg once weekly
- Week 17 onward: 2.4 mg once weekly (maintenance)
This schedule is identical whether you are in Toronto, Vancouver, Montreal, or anywhere else in Canada. Your healthcare provider may adjust the timing if you experience side effects. Some people stay at 1.0 mg or 1.7 mg for longer than four weeks if they are losing weight steadily and tolerating the medication well. There is no need to rush to the maximum dose if a lower one works for you.
How to Inject Semaglutide Correctly
Semaglutide comes in a pre-filled pen with a very fine needle. You inject it under the skin (subcutaneously) in your abdomen, thigh, or upper arm. Rotate injection sites each week to avoid lipodystrophy or skin irritation. The injection can be given at any time of day, with or without food. If you miss a dose, take it as soon as you remember within five days. If more than five days have passed, skip the missed dose and take your next one on the regular schedule.
Do not double up on doses. If you are switching from another GLP-1 medication, your doctor may start you at a different dose. Always follow the exact instructions from your Canadian prescriber or pharmacist.
What Results Can You Expect on Semaglutide for Weight Loss?
Clinical trials show that people taking 2.4 mg of semaglutide once weekly lose an average of 14.9% of their body weight over 68 weeks. That means a 200-pound person could expect to lose about 30 pounds. Some people lose more, some less. Weight loss typically begins slowly during the first few weeks, then accelerates as the dose increases. Most of the weight loss occurs between weeks 20 and 40 of treatment.
In Canada, real-world results are similar. Patients who follow the titration schedule and combine the medication with a reduced-calorie diet and increased physical activity see the best outcomes. Semaglutide is not a magic bullet. It works by reducing appetite and slowing gastric emptying, which helps you eat less without feeling deprived. But you still need to make sustainable lifestyle changes to keep the weight off long term.
Common Side Effects and How to Manage Them
The most common side effects of semaglutide are gastrointestinal. Nausea, vomiting, diarrhea, constipation, and abdominal pain affect up to 20% of users, especially during dose increases. These side effects are usually mild to moderate and tend to improve over time. To reduce nausea, eat smaller meals, avoid high-fat foods, and stay hydrated. Some people find that injecting in the thigh rather than the abdomen causes fewer stomach issues.
More serious side effects are rare but possible. These include pancreatitis, gallbladder disease, kidney injury, and thyroid C-cell tumors (seen in rodents, not confirmed in humans). Semaglutide should not be used by people with a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2. If you experience severe abdominal pain, persistent vomiting, or signs of an allergic reaction, seek medical attention immediately.
Semaglutide Canada: Availability and Prescribing
In Canada, Wegovy (semaglutide 2.4 mg) is approved by Health Canada for chronic weight management in adults with a BMI of 30 or greater, or 27 or greater with at least one weight-related comorbidity such as high blood pressure or type 2 diabetes. Ozempic (semaglutide 0.25 mg, 0.5 mg, 1.0 mg) is approved for type 2 diabetes but is often prescribed off-label for weight loss. Both are available by prescription only.
Coverage varies by province and private insurance plan. Some plans cover Wegovy for weight loss, but many do not. Without insurance, a one-month supply of Wegovy can cost between $400 and $500 CAD. Ozempic is often less expensive, around $250 to $350 CAD per month, but the maximum approved dose for diabetes is 1.0 mg, which may be less effective for weight loss than the 2.4 mg Wegovy dose. Talk to your doctor about which option is right for you.
How Long Should You Stay on Semaglutide?
Semaglutide for weight loss is intended for long-term use. If you stop taking it, you will likely regain some or all of the weight you lost. Studies show that people who discontinue semaglutide regain an average of two-thirds of their lost weight within one year. This is because the underlying biology that drives appetite and weight regain does not go away. Semaglutide is a chronic treatment, not a short-term fix.
Your doctor will monitor your progress and adjust your dose as needed. If you reach your goal weight, you may be able to step down to a lower maintenance dose. Some people stay on 1.7 mg or 1.0 mg long term. The key is to find the lowest effective dose that keeps your weight stable and your appetite under control.
Semaglutide vs. Other GLP-1 Medications for Weight Loss
Semaglutide is not the only GLP-1 receptor agonist used for weight loss. Tirzepatide (Mounjaro, Zepbound) is a dual GIP/GLP-1 agonist that leads to even greater weight loss, around 20% of body weight on average. Liraglutide (Saxenda) is a daily injection that produces about 8% weight loss. Retatrutide, a triple agonist, is in late-stage trials and shows promise for 24% weight loss. Semaglutide sits in the middle: more effective than liraglutide, less effective than tirzepatide, but with a longer track record and broader insurance coverage in Canada.
If you are considering semaglutide for weight loss, talk to your healthcare provider about all available options. The right choice depends on your medical history, budget, and how your body responds to the medication. Some people switch from semaglutide to tirzepatide if they hit a plateau, while others do the opposite due to cost or side effects.
Frequently Asked Questions About Semaglutide Dosage
Can I start at a higher dose to lose weight faster?
No. Starting at a higher dose significantly increases the risk of severe nausea, vomiting, and dehydration. The titration schedule exists for a reason. Follow it exactly as prescribed.
What if I miss a dose?
If you miss a dose and it has been less than five days, take it as soon as you remember. If more than five days have passed, skip that dose and take your next one on the regular day. Do not take two doses at once.
Can I split my dose into two injections per week?
No. Semaglutide is designed for once-weekly dosing. Splitting the dose is not recommended and may lead to unpredictable blood levels and side effects.
How long does it take for semaglutide to start working?
You may notice reduced appetite within the first week, but significant weight loss usually takes several weeks to months. Most people see noticeable results by week 12 to 16, once they reach the 1.0 mg or 1.7 mg dose.
Is semaglutide safe for long-term use?
Yes, semaglutide has been studied for up to two years in clinical trials and is considered safe for long-term use when prescribed appropriately. Regular monitoring by your doctor is recommended.
Where to Get Semaglutide in Canada
Semaglutide is available at most Canadian pharmacies with a valid prescription. You can also use online telehealth services that connect you with a licensed Canadian physician. These services are convenient, but make sure they are legitimate and require a real consultation. Avoid buying semaglutide from unregulated online sources, as counterfeit products are a growing problem. Always verify that the pharmacy is licensed by the provincial regulatory authority.
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The author does not endorse vendors, sellers, or sources of any peptide discussed in this article.