Written by: Ryan Clark, Health & Wellness Writer
Medically Reviewed by: Dr. Sarah Mitchell, MBBS, MRCGP — General Practitioner
Last Updated: February 2026 | Fact-Checked ✓
Wegovy weight loss week by week is one of the most important topics for anyone beginning their semaglutide journey. Starting a new weight loss medication like Wegovy (semaglutide) is a significant step, and it’s natural to wonder what to expect. Unlike fad diets or quick fixes, Wegovy is designed for gradual, sustained weight loss, and the journey happens over months, not days. Understanding the timeline can help you set realistic expectations and stay motivated.
Table of Contents
This week-by-week guide provides a rough outline of what you might experience during your first two months and beyond on Wegovy, from initial side effects and appetite changes to noticeable weight loss. This timeline is based on clinical trial data and real-world experiences from platforms like Habitual. [1]
Weeks 1-4: The Adjustment Period (0.25mg Dose)
The first month on Wegovy is primarily an adjustment period. You will begin on the lowest starting dose of 0.25mg once a week. The main goal during this phase is to introduce the medication to your body gently and minimize potential side effects.
- What to Expect:
- Appetite Reduction: You will likely start to notice a reduction in your appetite within the first week or two. The feeling of fullness (satiety) after meals will last longer.
- Side Effects: This is when gastrointestinal side effects like nausea, mild abdominal discomfort, or changes in bowel habits are most likely to appear. These are usually mild and tend to fade as the month progresses.
- Weight Loss: Meaningful weight loss is unlikely at this stage. You might lose a few pounds, but the primary focus is on acclimatizing to the medication.
- Key Actions:
- Establish a routine for your weekly injection.
- Focus on adopting healthy habits: eat smaller, balanced meals and begin a light exercise regimen.
- Stay well-hydrated to help manage any side effects.
Weeks 5-8: Building Momentum (0.5mg Dose)
After four weeks on the starting dose, you will titrate up to 0.5mg once a week, provided you are tolerating the medication well. For many users, this is when the effects of Wegovy become more consistent and noticeable.
- What to Expect:
- Consistent Appetite Suppression: The feeling of fullness should now be more constant throughout the week, rather than fluctuating.
- Noticeable Weight Loss: This is often when weight loss begins in earnest. According to some guides, you might expect to see a reduction in body weight of 2% to 4% during this period. [1]
- Physical Changes: You may start to see small physical changes, such as clothes fitting more loosely.
- Return of Side Effects: Increasing the dose can sometimes cause a temporary return of side effects like nausea. Continue using management strategies to mitigate them.
- Key Actions:
- Double down on the healthy habits you started in the first month.
- Monitor your progress, but don’t get discouraged by daily fluctuations. Focus on the weekly trend.
Weeks 9-16: The Acceleration Phase (1.0mg and 1.7mg Doses)
This period involves two further dose escalations as you work your way towards the full maintenance dose. You will spend four weeks on 1.0mg and then four weeks on 1.7mg.
- What to Expect:
- Significant Weight Loss: As the dosage increases, the rate of weight loss typically accelerates. This is when many people see the most dramatic results.
- Improved Health Markers: Beyond weight loss, you may notice secondary benefits like increased energy levels, better sleep, and improvements in health markers like blood pressure or blood sugar (if previously elevated).
- The Weight Loss Plateau: It is also possible to experience your first weight loss plateau during this phase, where your weight loss stalls for a week or two. This is a normal part of any weight loss journey.
- Key Actions:
- Stay consistent with your diet and exercise. If you hit a plateau, consider slightly adjusting your calorie intake or exercise intensity.
- Celebrate non-scale victories, such as having more energy or feeling better in your clothes.
Week 17 and Beyond: Long-Term Maintenance (2.4mg Dose)
From week 17 onwards, you will be on the full maintenance dose of 2.4mg once a week. This is the dose used in the major clinical trials where patients achieved an average of 15% body weight loss over 68 weeks. [2]
- What to Expect:
- Steady, Continued Weight Loss: Weight loss will continue, though it may be at a slower, more steady pace than during the acceleration phase.
- Long-Term Habit Formation: The goal now is to solidify the lifestyle changes you have made, ensuring you can maintain your weight loss long-term.
- Key Actions:
- Continue working with your healthcare provider to monitor your progress and health.
- Focus on the holistic benefits of your new lifestyle, including improved mental and physical well-being.
Frequently Asked Questions (FAQ)
1. How quickly will I lose weight on Wegovy?
While some effects are immediate, noticeable weight loss typically begins after the first month, once the dose is increased to 0.5mg. Significant results are most common after 3-6 months of consistent use.
2. What happens if I miss a dose of Wegovy?
If you miss a dose and your next scheduled dose is more than 2 days (48 hours) away, take the missed dose as soon as possible. If it is less than 2 days away, skip the missed dose and take your next dose on the regularly scheduled day. Never take two doses at once.
3. Do I have to stay on Wegovy forever?
Wegovy is intended for long-term weight management. Studies show that if you stop taking the medication without maintaining lifestyle changes, you are likely to regain most of the weight. Any decision to stop the medication should be made in consultation with your doctor.
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Semaglutide (Wegovy, Ozempic) is a prescription medication that should only be used under the supervision of a qualified healthcare professional. Always consult your GP or specialist before starting, stopping, or changing any medication. Individual results may vary.