
Wegovy is a prescription medication used to treat obesity and weight-related health problems. It is a glucagon-like peptide-1 (GLP-1) receptor agonist that suppresses appetite and targets areas of the brain involved in controlling food intake. While effective, it can cause a range of side effects, from mild to severe. The most common side effects of Wegovy include nausea, diarrhea, vomiting, constipation, abdominal pain, headache, tiredness, dizziness, and low blood sugar. More serious side effects may include pancreatitis, gallbladder problems, thyroid cancer, and severe muscle loss. It is important for patients to be aware of these potential risks and consult their healthcare provider if they experience any adverse reactions.
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What You'll Learn

Pancreatitis and gallbladder problems
Wegovy is a prescription medication that may cause a range of side effects, from mild to severe. Some of the most common side effects include nausea, vomiting, abdominal pain, and diarrhoea. However, there are more serious potential side effects, including pancreatitis and gallbladder problems.
Pancreatitis is the inflammation of the pancreas, an organ that secretes enzymes to aid digestion and produces and releases insulin. Pancreatitis can cause severe abdominal pain that may radiate to the back, and it may be accompanied by vomiting. If you experience these symptoms, it is crucial to stop taking Wegovy immediately and seek medical attention.
Gallbladder problems, including gallstones, have also been reported as a side effect of Wegovy. Gallstones can be extremely painful and may require surgery for removal. Symptoms of gallbladder issues include pain in the upper stomach or abdomen, fever, jaundice (yellowing of the skin or eyes), and clay-coloured stools. Again, if you experience any of these symptoms, it is important to contact your healthcare provider right away.
It is worth noting that while these side effects are possible, they are considered less common or rare. Additionally, individual experiences with medication can vary, and not everyone will experience the same side effects. It is always important to monitor your body's response to any new medication and consult your healthcare provider if you have any concerns or experience adverse reactions.
Furthermore, prolonged use of Wegovy may lead to malnutrition, which can result in severe muscle loss or sarcopenia, a potentially life-threatening condition. Therefore, it is important to follow the prescribed treatment plan, which typically includes increased physical exercise and a balanced diet, to mitigate these risks.
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Possible thyroid cancer
While muscle pain is not listed as a side effect of Wegovy, the drug does carry a risk of thyroid cancer. This has been observed in animal studies, but it is not known if Wegovy will cause thyroid tumours or a type of thyroid cancer called medullary thyroid carcinoma (MTC) in humans.
If you experience a lump or swelling in your neck, hoarseness, trouble swallowing, or shortness of breath, these may be symptoms of thyroid cancer, and you should tell your healthcare provider immediately. These side effects are rare, but it is important to be aware of them and to consult a doctor if you experience any severe symptoms.
Other serious but less common side effects of Wegovy include inflammation of the pancreas (pancreatitis), gallbladder disease (such as gallstones), severe allergies, and low blood sugar (hypoglycaemia). Pancreatitis requires immediate medical attention, and you should stop taking Wegovy and call your healthcare provider if you experience severe abdominal pain with or without vomiting. Gallbladder problems may also require surgery, so it is important to contact your healthcare provider if you experience symptoms such as pain in the upper stomach, fever, jaundice, or clay-coloured stools.
Some patients taking GLP-1 receptor agonists like Wegovy have also reported kidney injury and worsening kidney function. Dehydration is another possible side effect, especially in high temperatures, so it is important to stay hydrated while taking this medication. In addition, some users have experienced extreme muscle loss, which can occur when people lose weight quickly but do not exercise enough. This can lead to sarcopenia, which is severe muscle loss that may result in death.
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Gastroenteritis and malnutrition
Wegovy may cause a range of side effects, from mild to severe. Some of the most common side effects include nausea, vomiting, abdominal pain, headache, diarrhoea, constipation, fatigue, dizziness, and belching. Gastroenteritis, an inflammation of the stomach and intestines, is listed as a possible adverse reaction to Wegovy. This can lead to severe dehydration.
Prolonged periods of taking Wegovy may lead to malnutrition due to its appetite-suppressing effects. This can be a difficult side effect for weight-loss patients to accept, but malnutrition is a serious condition that can have diverse consequences, including impaired child development, increased mortality rate, and suboptimal functioning in individuals. Malnutrition can also cause increased susceptibility to infections, as it leads to a deterioration of immune function.
In addition to malnutrition, Wegovy may also cause muscle loss, especially if users do not engage in sufficient exercise during their weight loss journey. This muscle loss can be severe and even lead to death. Therefore, it is important to be aware of the potential side effects of any medication and to discuss any concerns with a healthcare professional.
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Vision loss and blood clots
Wegovy is a prescription medication with several potential side effects, ranging from mild to severe. Some of the most common side effects include nausea, vomiting, abdominal pain, headache, and diarrhoea.
Now, while muscle pain is not explicitly mentioned as a side effect of Wegovy, there are reports of abdominal pain as a side effect. Additionally, muscle loss has been observed as a common side effect of weight loss drugs, and eating more protein while taking these medications may help prevent it.
Let's shift our focus to vision loss and blood clots. Vision loss and blood clots are not direct side effects of Wegovy mentioned in the sources. However, blood clots and vision loss are closely related, as sudden vision loss can be a symptom of a blood clot in the eye, known as an eye stroke or retinal artery occlusion. This is a medical emergency that requires immediate attention.
An eye stroke occurs when blood flow to the retina is blocked, often by a blood clot, resulting in reduced oxygen supply to the retinal cells, which can start to die within minutes or hours. The blockage may be caused by a clot that forms in the retina or travels there from another part of the body. This condition can lead to permanent vision damage if not treated promptly.
Symptoms of an eye stroke include a sudden complete or partial loss of vision in one eye, usually without pain. Treatment options for an eye stroke include medications to dissolve the clot or reduce eye pressure, laser treatment, eye massage, and paracentesis, where a needle is used to remove fluid from the eye to reduce pressure.
In summary, while Wegovy may not directly cause vision loss or blood clots, it's important to be aware of the potential risk of eye strokes and their symptoms, especially when taking medications that can affect blood clotting or circulation.
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Headaches and fatigue
Wegovy is a prescription medication that is administered via injection. It is prescribed for weight loss and to lower the risk of cardiovascular problems in some people. It is approved for use in adults and children aged 12 and older who are obese or overweight and have weight-related issues such as high blood pressure or high cholesterol.
Like any medication, Wegovy has several side effects, some of which are mild to moderate, while others are severe and may require immediate medical attention. The most commonly reported side effects include:
- Diarrhea
- Nausea
- Vomiting
- Constipation
- Headache
- Abdominal pain
- Fatigue
- Dizziness
- Indigestion
- Injection site reactions
Fatigue or tiredness can also be a side effect of Wegovy. This may be due to the body adjusting to the medication and the changes it induces in appetite and metabolism. To manage fatigue, it is important to eat a balanced diet, get 7-9 hours of sleep, and engage in regular exercise or light activities to boost energy levels.
While headaches and fatigue are common side effects, it is important to monitor their severity and persistence. If these side effects become bothersome or persistent, it is recommended to consult a healthcare provider for further advice and management strategies. Additionally, severe side effects such as pancreatitis, gallbladder issues, and kidney problems require immediate medical attention.
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Frequently asked questions
The most common side effects of Wegovy include nausea, diarrhea, vomiting, constipation, abdominal pain, headache, tiredness, upset stomach, dizziness, belching, low blood sugar, gas, stomach flu, heartburn, and a runny nose or sore throat.
Muscle pain is not listed as a side effect of Wegovy. However, the drug may cause muscle loss, which can be severe or even lead to death.
Serious side effects of Wegovy include low blood sugar, gallbladder problems, pancreatitis, and thyroid cancer.
If you experience any side effects from Wegovy, you should consult your doctor or healthcare provider. For severe side effects, such as severe abdominal pain or signs of thyroid cancer, seek immediate medical attention.





































