What Commonly Happens in the First Week on Wegovy
Because Wegovy (semaglutide) is started at a low introductory dose, week one is mostly about your body adjusting to the medicine rather than dramatic results. A prescriber-led titration schedule means the dose increases gradually over a number of weeks — your prescriber will guide that timetable.
Appetite and food noise
Some people notice a modest reduction in appetite or a slight quietening of food thoughts in the first week. Others feel little change at all — both experiences are completely normal at this early stage. If you are still hungry in the first week of Wegovy, that is very common and does not mean the medicine is not working.
Commonly reported first-week side effects
Mild nausea, a sense of fullness after smaller amounts of food, and occasional indigestion are among the most frequently reported experiences in the early weeks. These effects are linked to how semaglutide acts on GLP-1 pathways and influences the rate at which the stomach empties. For most people they are mild and tend to settle as the body adjusts. If any symptom feels severe or persistent, speak with your healthcare professional promptly — they can help you decide how to proceed.
Weight changes in week one
Weight loss in the first week, if it happens at all, is often modest and can reflect water or digestive changes as much as fat loss. Comparing your experience to others can be discouraging — individual results vary considerably depending on starting weight, eating patterns, hydration, and many other factors. For a fuller picture of what the early weeks can look like, take a look at what the first week on Mounjaro is like and how the two medicines compare in terms of early experience. You may also find it useful to read about navigating the first week on Mounjaro for broader GLP-1 first-week context. For a view beyond week one, our guide to weight loss in the first two weeks covers how progress often builds over time.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Tracking Your First Week with GLP Trackr
The first week is one of the most valuable times to start logging — not because the numbers will be dramatic, but because having a baseline makes every subsequent week more meaningful. GLP Trackr's daily check-in captures weight, energy, mood, food noise, and sleep in around 30 seconds each morning, so you build a real picture of how your body is responding from day one.
Beyond the check-in, the weight and progress charts turn a single week's data into a visual trend, helping you see direction rather than fixating on individual daily fluctuations. Over time, the insights feature can surface correlations — for example, whether the days you hit your protein target tend to show better energy — that are genuinely useful to bring to appointments with your prescriber.
You can also log your first injection: the date, dose, and site. That record becomes the foundation of your injection history, and as weeks go on GLP Trackr can suggest your next rotation site automatically.
For a broader look at tracking your Wegovy journey over time, visit our guide to weight loss tracking on GLP-1 medicines.
A note on symptoms: GLP Trackr's side-effect log is a useful companion tool, but it is not a substitute for clinical advice. If anything you experience in week one feels worrying — severe nausea, persistent vomiting, or anything unexpected — contact your healthcare professional rather than waiting to see if it resolves.
Start your first week with a clear record behind you. GLP Trackr is free to try for 7 days — download it on the App Store or Google Play and begin logging from your very first dose.
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Start every day with a 60-second wellness check-in. Log how you're feeling, track nausea, appetite, energy, and mood — giving you and your care team a complete picture of how your medication is working.
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Log every dose with a single tap. Track your dose history, phase in your cycle, estimated medication levels, and upcoming injection dates — with reminders so you never miss a scheduled shot.
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Smart Meal Planning
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Beautiful, easy-to-read charts show your weight loss trajectory, weekly nutrition trends, medication responses, and wellbeing scores over time — turning raw data into genuine insights.
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Log walks, workouts, and movement with activity targets that flex with your energy levels. On lower-energy dose days, gentler targets keep you moving without burning out.
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Frequently asked questions.
Yes, it is very common. The starting dose of Wegovy is intentionally low, so significant appetite reduction often develops over several weeks as the dose is adjusted by your prescriber. Feeling hungry in week one does not mean the medicine is not working.
Weight changes in week one, if any, are often modest and vary widely between individuals. Early shifts can reflect changes in water retention or digestion rather than fat loss. Progress builds gradually over weeks and months, not days.
Mild nausea, a feeling of fullness after eating less than usual, and occasional indigestion are among the most commonly reported early experiences. These often ease as the body adjusts. If symptoms are severe or persistent, speak with your healthcare professional promptly.
Both medicines start at a low introductory dose, so early experiences are broadly similar — modest appetite changes and mild digestive side effects are common with both. The active substances differ (semaglutide vs tirzepatide), so individual responses can vary. Your prescriber is the right person to compare them for your situation.
Logging daily weight, mood, energy, and food noise from day one builds a useful baseline. An app like GLP Trackr lets you record your first injection, track side effects, and see your early trends in one place — giving you meaningful data to discuss with your prescriber.