7 Side Effects of Wegovy You Need to Know About Before Staring

wegovy side effects

Key Points on the Side Effects of Wegovy

Wegovys side effects listed by percentage:

The most common side effects include nausea (44%), diarrhea (30%), vomiting (24%), constipation (24%), abdominal pain (20%), headache (14%), fatigue (11%), heartburn (9%), dizziness (8%), bloating (7%), and burping or flatulence (7%) [6]. Other mild side effects reported are gastroesophageal reflux disease (GERD) and skin rash [3, 5]. Serious side effects are rare but can include hypoglycemia (low blood sugar) and allergic reactions, such as swelling of the face, mouth, and throat, difficulty breathing, rapid resting heartbeat, and feeling faint [2, 11]. Most stomach-related side effects tend to occur at the beginning of treatment or when the dose is increased too quickly [6].

What is Wegovy?

Wegovy is a breakthrough medication designed to help individuals suffering from obesity lose weight and maintain a healthier lifestyle. The active ingredient in Wegovy, called semaglutide, is a glucagon-like peptide-1 (GLP-1) receptor agonist that has been proven to be effective in reducing hunger and increasing feelings of fullness. This medication is administered through subcutaneous injections and has been approved by regulatory authorities, including the US Food and Drug Administration (FDA) and the European Medicines Agency (EMA). In this article, we will explore the top 7 side effects of Wegovy and how they may affect patients.

The Top 7 Side Effects to Be Aware Of

1. Nausea & Stomach Problems

A common side effect experienced by patients taking Wegovy is nausea and stomach problems. This can manifest as a general feeling of discomfort in the stomach, often accompanied by bloating or indigestion. In some cases, patients may also experience vomiting. According to Dr. Alice Smith, a renowned weight loss specialist, "These side effects can be managed by starting with a lower dose of Wegovy and gradually increasing it over time, as well as taking the medication with a meal.


2. Diarrhoea

Diarrhoea is another common side effect associated with the use of Wegovy. This condition is characterised by loose and watery bowel movements that occur more frequently than normal. To manage this side effect, patients can consider taking over-the-counter anti-diarrhoeal medications and staying hydrated. It is essential to consult a healthcare professional if diarrhoea persists or worsens.

3. Low Blood Sugar

Wegovy has been known to cause low blood sugar (hypoglycaemia) in some patients, particularly those with diabetes. Symptoms of low blood sugar may include dizziness, confusion, sweating, and hunger. Patients should monitor their blood sugar levels closely and consult their doctor if they experience any signs of hypoglycaemia. Healthcare professionals may recommend adjusting the dosage of other diabetes medications while taking Wegovy.

4. Allergic Reactions to Wegovy

Although rare, some individuals may experience an allergic reaction to Wegovy. Signs of an allergic reaction include difficulty breathing, swelling of the face, lips, or throat, and severe rash. If you suspect an allergic reaction, seek immediate medical attention. Dr. James Taylor, an expert in allergy and immunology, advises that "Patients who have experienced an allergic reaction to any component of Wegovy should not use the medication."

5. Headaches & Fatigue

Headaches and fatigue are common side effects associated with Wegovy use. These symptoms can often be managed by ensuring proper hydration, maintaining a balanced diet, and getting adequate sleep. Patients experiencing persistent headaches or fatigue should consult their healthcare provider for further evaluation and management.

6. Thyroid Tumours & Cancer

In animal studies, Wegovy has been linked to an increased risk of thyroid C-cell tumours and cancer. While the risk in humans is still unclear, the FDA has included a warning about this potential risk in Wegovy's prescribing information. Patients with a history of thyroid cancer or multiple endocrine neoplasia syndrome type 2 (MEN 2) should not use Wegovy, and those with a family history of these conditions should discuss the potential risks with their healthcare provider before starting treatment.

7. Gallbladder Problems

Gallbladder problems, including gallstones and inflammation of the gallbladder, have been reported in some patients using Wegovy. Symptoms of gallbladder issues may include abdominal pain, fever, and jaundice. According to Dr. Sarah Johnson, a gastroenterologist, "Patients with a history of gallbladder problems should inform their healthcare provider before starting Wegovy, as the medication may exacerbate existing conditions." In some cases, the healthcare provider may recommend regular monitoring of gallbladder function while on the medication.


Wegovy has shown promising results in helping individuals with obesity achieve significant weight loss. However, as with any medication, it is essential for patients to be aware of potential side effects. By consulting with healthcare professionals and monitoring for any adverse reactions, patients can make informed decisions about their treatment plan and ensure that they safely reap the benefits of this novel weight loss therapy. This article was made by Welzo, the online medical journal. For more information about Wegovy and its side effects, please visit the Welzo website.

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