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Wegovy contains semaglutide — the same active substance as Ozempic — which is associated with rapid weight loss in many users. That’s why people wonder whether it can help them shed some pounds in as little as one week. If it’s your first time using this weight loss medication, your experience during the first week of Wegovy may differ from that of other users. Each person responds differently to the drug, and factors like lifestyle and genetics come into play. For instance, some may lose a bit of weight within a few days, whereas it may take others two weeks or more to see physical changes. This article examines how Wegovy works and what to expect after your first injection, including its potential side effects and results after one week.

Key Takeaways

  • Wegovy contains semaglutide and is FDA-approved for managing chronic weight problems and reducing the risk of heart complications in patients diagnosed with cardiovascular disorders.
  • Wegovy is available in doses of 0.25 mg, 0.5 mg, 1 mg, 1.7 mg, and 2.4 mg. Doctors prescribe the lowest dose for four weeks to allow the body to adjust to the medication’s effects.
  • During the first week of Wegovy, some users may experience nausea, fatigue, and other digestive issues. They may also experience fewer cravings and lose a slight amount of weight.
  • Lifestyle changes, such as eating small, bland meals, staying hydrated, and getting 7–9 hours of sleep, can help minimize Wegovy’s side effects.
  • It may take two weeks or more of treatment before some users may notice changes in their appetite. It’s normal since semaglutide affects each person differently.

Day 1 of Wegovy: What to Expect From Your First Shot

What Side Effects Should You Expect?

You’ll start with the lowest dose of 0.25 mg. The purpose of the first Wegovy shot is to introduce semaglutide into your system and observe how it responds. 

During your first day on Wegovy, you may experience mild nausea or minor changes in your appetite, such as a feeling of slight fullness. You may also not experience any changes at all. Each patient’s experience with Wegovy is unique, as each body responds differently to the medication. 

To ease any initial discomfort, consume foods that are easy on the stomach, such as toast, rice, or broth-based soups. Additionally, drink plenty of water to keep your body hydrated and avoid high-fat foods, such as fried chicken and bacon. 

Wegovy Side Effects: When Do They Start?

Nausea is the most commonly reported side effect of Wegovy, and it may begin within 1 to 3 days of treatment, but its onset can vary from person to person. If you’re sensitive to gastrointestinal adverse reactions, you may feel nauseous a few hours after injection. For people with better tolerance, it may take three or more days before nausea and other early Wegovy side effects appear. 

Other typical side effects with Wegovy include: 

    • Diarrhea
    • Fatigue
    • Dyspepsia
    • Dizziness
    • Vomiting
    • Constipation
    • Abdominal pain 
    • Headache
    • Abdominal distension
    • Eructation
    • Gastroenteritis
    • Gastroesophageal reflux disease (GERD)
    • Nasopharyngitis or common cold
    • Hypoglycemia in patients with type 2 diabetes
    • Flatulence

Most of these side effects are temporary and typically ease after a few weeks.

Wegovy Week 1 Results: Does It Work Right Away?

Lady standing on scale

Wegovy is a once-weekly injection. The single dose you receive during week one is often not enough to promote weight loss. However, you may feel its appetite suppression effects early on. You may find yourself feeling less hungry and less inclined to reach for sweets or snacks during the first seven days.

Some people may lose a small amount of weight, depending on their diet and exercise regimen. Factors such as genetics — if you’re predisposed to losing fat quickly — co-occurring conditions, and overall lifestyle can affect Wegovy’s results in the first week. 

The full effects of Wegovy are more visible after several weeks of consistent use.

Real Experiences: What Reddit Users Say About Week 1 Treatment

People have different experiences with Wegovy in their first week of treatment. One Reddit user reported that nausea kicked in after an hour of taking their first Wegovy shot and continued until the end of the week. Another reported side effect was ‘food noise,’ or obsessive, repeated thoughts about food. They also noticed fewer cravings and felt fuller after consuming a smaller amount of food than they typically did before treatment. 

Regarding weight loss, some users reported losing a few pounds. One user reported losing 1.5 kg of weight during the first week of Wegovy, and another person lost 2.65 kg. Some reported minor side effects include food noise, fatigue, constipation, and reduced cravings for unhealthy foods.

Not all patients will experience weight loss during their first week of Wegovy treatment. After all, the purpose of the initial dose is to assess your tolerance to the side effects. Don’t be discouraged if you don’t see any changes on the scale yet. Give your body time to adjust to the drug’s effects. 

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Hunger in Week 1: Still Hungry or Feeling Full?

Woman touching her stomach due to stomach pain

Many patients expect Wegovy to switch off their hunger right away — but it may not happen within one week. The drug’s effects can vary from person to person, and for some people — especially those who’ve previously tried Ozempic or another similar-acting drug — the effects may be gradual. 

However, your cravings may reduce. Others may still feel the urge to eat more, but this doesn’t mean the medication isn’t working at all. If you’re still hungry after the first week of Wegovy, consider adjusting your diet. Include foods rich in protein, such as chicken, eggs, and seafood, to increase feelings of fullness. Don’t forget to mix them up with fiber-rich options, such as whole grains and veggies, to help with digestion. Check out this 7-day Wegovy meal plan if you need help with your meals, or hire a food expert for assistance with customizing them.

By weeks two or three, you may notice a decrease in appetite. Until then, stick to your Wegovy dosing schedule. 

Week-by-Week Expectations: What Happens After Week 1?

You’ll be on the lowest 0.25 mg Wegovy dose for four weeks, so the results may be minimal. 

  • 1
    Week 1: You may have fewer cravings, lose some weight, and feel full after eating a small amount of food. Alternatively, you may experience nausea, fatigue, constipation, and other early side effects.
  • 2
    Week 2: There may be little to no changes from week 1. If you’re one of those who handle stomach-related side effects, it may be during the second week that nausea, abdominal pain, and other side effects kick in. You may lose a couple of pounds if you continue to diet and exercise regularly.
  • 3
    Week 3: The appetite-suppression effects are stronger at this time. Your body starts to stabilize at this stage, so intense cravings could fade. You’ll likely get into the rhythm of your weekly injections, and may feel less affected by the side effects.
  • 4
    Week 4: At this point, side effects may start to subside. Appetite suppression is more consistent throughout the week. You may notice changes on the weighing scale and feel more in control of your eating habits, despite the incessant food noise. For some, it may still be too early to see physical signs of weight loss.

Everyone’s weight loss journey is different, so the one-month before and after results on Wegovy are not universal. It’s best to focus on being consistent with your treatment. Combine Wegovy with a balanced or low-calorie diet and regular physical activity for more optimal results. 

If you experience any unusual symptoms during your first month of Wegovy, inform your doctor so they can assess your condition. 

What to Tell Your Doctor If Side Effects Are Intolerable

If you experience difficult-to-manage side effects during the first week of Wegovy treatment, consult your doctor for guidance. They may extend your initial treatment period from four weeks to eight weeks or more, depending on how long your body can adapt to the drug’s effects. 

Keep a health journal and record your symptoms and changes in hunger levels in more detail. If you tell your doctor, “I started experiencing severe nausea a few hours after the injection and it persists until now,” it will give them a clearer picture of your experience with the medication, helping them make a more informed decision about your treatment plan. In case of severe or unusual symptoms, they may ask you to stop Wegovy and switch to a different GLP-1 drug.  

Tips for a Successful First Week on Wegovy

Here are some tips to manage the side effects during your first week on Wegovy.

  • Eat easy-to-digest meals: Choose foods that won’t upset your stomach. Some examples are brothy soups, toast, bananas, rice, and salads.
  • Get enough sleep: It’s easier to manage the side effects if you’re well rested. Get at least 7-8 hours of quality sleep.
  • Avoid greasy foods and alcohol: They can intensify nausea, indigestion, and other gastrointestinal issues.
  • Take anti-nausea medications: If nausea is intolerable, ask your doctor for an OTC medication or prescription, such as Zofran, to relieve the symptom. You may also try aromatherapy, breathing exercises, and ginger tea to naturally ease nausea.
  • Join online support groups: Join Facebook and other social media support groups to hear real-life experiences and firsthand tips from others who are on the same weight loss journey as you. Sometimes, knowing that others are experiencing the same challenges can ease your worries and empower you to continue with your treatment.

One Week Isn’t Enough to Lose Weight With Wegovy

It takes patience and consistency to see real results with Wegovy. Don’t feel discouraged if you don’t notice any changes early in the treatment. It’s only the beginning, and your first week of Wegovy treatment may differ from others’ experiences.

If gastrointestinal issues are intolerable, ask your doctor for advice on how to effectively manage them. Some side effects may indicate that your body is adjusting to the medication. Moreover, track your symptoms and progress weekly in a health journal. It’s a small step that will help your doctor improve your experience with Wegovy and overall treatment outcomes. 

Frequently Asked Questions

It depends on your body’s response to the medication. Some people may notice feeling less hungry within the first few days, while others may need up to two weeks to notice appetite changes or develop common side effects.

Wegovy is taken once a week, on the same day each week, at any time of day, with or without food.

The five ways to optimize weight loss with Wegovy include eating a low-calorie, high-protein diet, staying hydrated, getting enough sleep, exercising regularly, and tracking your progress in a health journal.

It depends. Some users may lose up to 4 lbs, while others may not see any changes in the scale. It’s okay if you don’t see any dramatic results during the first week on Wegovy. After all, the lowest dose is meant to introduce semaglutide into your system and assess how your body responds to it.

You may feel nauseous and slightly tired after your first Wegovy shot. However, these common side effects don’t affect everyone after their first Wegovy shot.

In week two of Wegovy treatment, you may feel stronger appetite suppression. You feel less hungry and have fewer cravings. Side effects either start to appear or subside, depending on how you respond to semaglutide.

Some people may notice changes in their appetite within the first week of taking Wegovy. However, weight loss typically happens after a dose increase, which is a month or more later.

Original Publish Date: 12/31/2024 – Updated 8/15/2025