Which Has More Side Effects: Wegovy or Zepbound?

Reading time
7 min
Published on
August 4, 2025
Updated on
November 18, 2025
Which Has More Side Effects: Wegovy or Zepbound?

Introduction

In the quest for effective weight loss solutions, many individuals are increasingly turning to medications like Wegovy and Zepbound. Both of these injectable drugs have gained recognition for their role in managing weight, but they come with a range of side effects that potential users need to understand. As we explore the differences between Wegovy and Zepbound, we’ll delve into their side effects, how they work, and what this means for those considering these treatments.

Did you know that over 70% of American adults are classified as overweight or obese? This staggering statistic highlights the pressing need for effective weight management solutions. In a world where the challenges of obesity are more evident than ever, medications like Wegovy (semaglutide) and Zepbound (tirzepatide) have emerged as promising options for individuals struggling to reach their weight loss goals.

Both drugs belong to the class of GLP-1 receptor agonists, which work by mimicking hormones that help regulate appetite and digestion. However, they differ in their active ingredients and mechanisms of action. This blog post aims to provide a comprehensive comparison of Wegovy and Zepbound, specifically focusing on their side effects. By the end of this article, you will have a clearer understanding of which medication may be better suited for your weight loss journey and what to expect in terms of side effects.

We’ll cover the following key points:

  • The mechanisms of action for both Wegovy and Zepbound
  • A detailed comparison of side effects associated with each medication
  • Factors that influence individual responses to these medications
  • Tips for managing side effects during treatment

With this information, we aim to empower you to make informed decisions about your weight loss journey. Let’s begin by looking at how Wegovy and Zepbound work within the body.

Mechanisms of Action

Understanding how Wegovy and Zepbound function is crucial for assessing their potential side effects.

Wegovy (Semaglutide)

Wegovy is a GLP-1 receptor agonist that primarily works by increasing feelings of fullness and reducing appetite. When injected, semaglutide stimulates the GLP-1 receptors in the brain, which helps control hunger signals. This leads to reduced food intake and, ultimately, weight loss. Additionally, Wegovy slows gastric emptying, meaning food stays in the stomach longer, contributing to the sensation of fullness.

Zepbound (Tirzepatide)

Zepbound, on the other hand, is unique because it acts as both a GLP-1 receptor agonist and a GIP (glucose-dependent insulinotropic polypeptide) receptor agonist. This dual action allows Zepbound to enhance weight loss effects further. By targeting both pathways, Zepbound not only suppresses appetite but also improves blood sugar control, which can be particularly beneficial for those with type 2 diabetes.

Summary

While both medications target similar hormone pathways to aid in weight loss, Zepbound’s dual mechanism has the potential to amplify both its effectiveness and its side effects. Now, let’s transition into a more detailed exploration of the side effects associated with each medication.

Side Effects of Wegovy and Zepbound

Both Wegovy and Zepbound are associated with side effects, particularly gastrointestinal issues. However, the intensity and prevalence of these side effects can differ between the two medications.

Common Side Effects

  1. Gastrointestinal Issues
    • Wegovy: Nausea, vomiting, diarrhea, and constipation are common. In clinical trials, up to 82% of participants reported some form of gastrointestinal side effect.
    • Zepbound: While Zepbound also causes nausea and diarrhea, some studies suggest that these side effects might be more pronounced due to its dual action mechanism. However, Zepbound users may experience fewer headaches compared to Wegovy users.
  2. Injection Site Reactions
    • Both medications can cause redness, swelling, or itching at the injection site. These reactions are generally mild and resolve quickly.
  3. Fatigue and Dizziness
    • Both Wegovy and Zepbound users have reported feelings of fatigue and dizziness, especially when beginning treatment or adjusting dosages.

Serious Side Effects

While most side effects are mild, there are serious risks associated with both medications that warrant attention.

  1. Thyroid Tumors
    • Both Wegovy and Zepbound carry a boxed warning regarding the risk of thyroid C-cell tumors based on animal studies. Although the relevance of these findings to humans remains unclear, individuals with a family or personal history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2 should avoid these medications.
  2. Pancreatitis
    • There is also a risk of pancreatitis with both medications. Symptoms include severe abdominal pain, nausea, and vomiting. If these occur, it’s essential to seek immediate medical attention.
  3. Kidney Issues
    • Reports of acute kidney injury have been noted in patients taking GLP-1 receptor agonists, particularly if dehydration occurs due to gastrointestinal side effects.

Comparing Side Effects: Wegovy vs. Zepbound

While both Wegovy and Zepbound can result in similar side effects, the intensity and frequency can vary. For instance, Zepbound may lead to more severe gastrointestinal issues due to its enhanced mechanism of action, but it appears to have a lower incidence of headaches compared to Wegovy.

Summary of Side Effects

Side Effect Wegovy Zepbound
Nausea Common (up to 82%) Common
Vomiting Common Less common
Diarrhea Common Common
Constipation Common Common
Injection Site Reactions Common Common
Fatigue Common Common
Thyroid Tumors (boxed warning) Yes Yes
Pancreatitis Yes Yes

Both medications offer valuable benefits in weight management, but understanding the potential side effects is crucial for making an informed choice.

Individual Responses to Medications

One of the most significant factors influencing side effects is individual patient response. Here are several aspects that can affect how a person reacts to either Wegovy or Zepbound:

  1. Personal Health History
    • Individuals with a history of gastrointestinal issues may be more prone to experiencing side effects like nausea and diarrhea.
  2. Dietary Habits
    • Diet plays a significant role in how well individuals tolerate these medications. A balanced diet can mitigate some gastrointestinal side effects, while excessive caloric restriction may exacerbate symptoms.
  3. Hydration Levels
    • Staying hydrated is crucial, especially for those experiencing diarrhea or vomiting. Dehydration can worsen side effects and lead to complications.
  4. Dosage Adjustments
    • Both medications require titration to minimize side effects. Rapid increases in dosage can heighten the risk of gastrointestinal issues, so following a prescribed titration schedule is essential.

Tips for Managing Side Effects

If you choose to pursue treatment with Wegovy or Zepbound, here are some strategies to manage potential side effects effectively:

  • Start Slow: Follow the titration schedule provided by your healthcare provider to allow your body to adjust gradually to the medication.
  • Eat Small Meals: Consuming smaller, more frequent meals can help ease gastrointestinal discomfort.
  • Stay Hydrated: Drink plenty of fluids to prevent dehydration, especially if experiencing diarrhea.
  • Monitor Symptoms: Keep a journal of your symptoms to discuss with your healthcare provider. This will help them make informed adjustments to your treatment plan.

Conclusion

As we’ve explored, both Wegovy and Zepbound present viable options for weight management, but they do come with their unique sets of side effects. While Wegovy is primarily a GLP-1 receptor agonist, Zepbound’s dual action may enhance its effectiveness but also its risk of gastrointestinal side effects.

In choosing between Wegovy and Zepbound, consider your personal health history, how well you tolerate medications, and your weight loss goals. Consulting with a healthcare provider can help you navigate these options and decide which medication aligns best with your needs.

If you’re interested in exploring personalized weight loss solutions, we encourage you to take our free assessment quiz to see if you qualify for our prescription weight loss medications. Together, we can work towards a healthier future.

FAQ

Can I switch between Wegovy and Zepbound?
Yes, switching is possible, but it should be done under the guidance of a healthcare provider to minimize side effects.

How long do side effects last?
Most side effects are temporary and may diminish as your body adjusts to the medication, typically within a few weeks.

Are there any dietary restrictions while taking these medications?
There are no strict dietary restrictions, but a balanced diet is recommended to support weight loss and manage side effects.

What should I do if I experience severe side effects?
If you experience severe side effects, such as persistent abdominal pain, nausea, or signs of dehydration, contact your healthcare provider immediately.

How do I know which medication is right for me?
Consulting with a healthcare provider is essential. They can assess your health history, weight loss goals, and potential side effects to recommend the best option for you.

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