The FDA approved the oral form of Wegovy on December 22, 2025, and it became widely available in pharmacies beginning in January 2026. For people waiting to switch from injections to an oral option, one important consideration is the potential side effects. The side effects of Wegovy pill are mostly digestive in nature, although some are metabolic and may affect the nervous system. If you’re planning to switch from injections to oral semaglutide, here are the 19 side effects you may experience and how to manage them.
Quick Answer: What Are the Side Effects of Wegovy Pill?
The most common side effects of oral Wegovy are:
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- Nausea: Affects 44% of users in FDA-monitored clinical trials
- Diarrhea: Affects 30% of users
- Vomiting: Affects 24% of users
- Constipation: Affects 24% of users
- Abdominal Pain: Affects 20% of users
- Headache: Affects 14% of users
According to the FDA prescribing information, the Wegovy pill causes 19 side effects that are similar in type and frequency to those of injectable Wegovy. However, the injection also causes injection-site reactions.
Other side effects of oral semaglutide for weight loss that occur less frequently include dysesthesia, hair loss, and viral gastroenteritis (stomach flu).
19 FDA-Reported Common Side Effects of Wegovy Pill
The side effects of oral semaglutide are digestive, neurological, and metabolic in nature. Clinical trials comparing Wegovy pill to placebo identified 19 common side effects. These occur because semaglutide slows digestion, alters appetite-regulating hormones, and changes metabolic processes. Most are temporary and improve as your body adapts.
1. Nausea (Placebo 16% vs. Wegovy Pill 44%)
The Wegovy pill causes nausea by slowing stomach emptying, which disrupts normal digestion, especially during the first two months and dose increases.
How to manage:
Eat smaller meals throughout the day. Avoid fatty and spicy foods, and stay hydrated by sipping ginger water, herbal tea, or electrolyte drinks. Increasing the dose slowly can minimize feeling sick on Wegovy.
2. Diarrhea (Placebo 16% vs. Wegovy Pill 30%)
Wegovy pill can cause diarrhea by altering gut motility, which leads to looser stools during the early stages of treatment.
How to manage:
Drink lots of water to prevent dehydration. Health experts recommend drinking 9 cups of fluids daily for women and 13 cups for men. Your required daily fluid intake depends on the climate where you live, how physically active you are, and how much you sweat. Increase fiber intake gradually and avoid spicy foods.
3. Vomiting (Placebo 6% vs. Wegovy Pill 24%)
Vomiting is one of the expected side effects of Wegovy tablets. The drug’s delayed gastric emptying action increases stomach fullness and activates vomiting reflex pathways, particularly when eating large meals or increasing medication doses.
How to manage:
Reduce portion sizes and eat slowly. Avoid greasy foods to minimize stomach irritation and vomiting episodes.
4. Constipation (Placebo 11% vs. Wegovy Pill 24%)
Wegovy pill promotes constipation by slowing intestinal contractions, allowing more water to be absorbed from the stool and reducing bowel movement frequency.
How to manage:
Drink more water. Increase fiber intake and consume at least 25 to 35 grams of fiber daily for good health. Ask your doctor if you can use stool softeners if needed.
5. Abdominal Pain (Placebo 10% vs. Wegovy Pill 20%)
The delayed digestion caused by the Wegovy pill can lead to stomach pain. When digestion slows down, intestinal pressure increases, gas builds up, and muscle contractions change, leading to abdominal discomfort during the first few weeks of treatment.
How to manage:
Avoid gas-producing foods, such as garlic, beans, onions, and broccoli. Eat smaller meals, and drink more water. If abdominal pain is intolerable, ask your doctor to increase the dose slowly.
6. Headache (Placebo 10% vs. Wegovy Pill 14%)
You may experience headaches on Wegovy pill due to dehydration, reduced calorie intake, and fluctuations in blood sugar. All of these can affect brain circulation, disrupt hormonal balance, and trigger a squeezing or sharp pain in your forehead or behind the eyes.
How to manage:
Increase water intake and never skip meals. Even if you don’t feel hungry, eat during mealtimes to keep your blood sugar levels stable.
7. Fatigue (Placebo 5% vs. Wegovy Pill 11%)
The cause of Wegovy pill fatigue is mainly reduced appetite. Semaglutide makes you eat less, meaning your body doesn’t get enough sugar for energy. For this reason, you may feel tired and unmotivated to do your daily tasks.
How to manage:
Eat foods packed with nutrients, such as fish, berries, and nuts. If you have food allergies, consult a nutritionist for a personalized meal plan. Drink more water, too, and make sure you get 7-9 hours of sleep every day. These lifestyle changes help your body adapt to the medication and reduce the side effects of the semaglutide pill for weight loss.
8. Dyspepsia or Indigestion (Placebo 3% vs. Wegovy Pill 9%)
Oral semaglutide slows stomach emptying, allowing acid to remain in the stomach longer. This can lead to indigestion and a burning sensation after eating.
How to manage:
Eat smaller meals and avoid acidic foods. Remain upright after eating — wait at least one hour before lying down. If the symptoms persist, ask your doctor whether you can take an antacid.
9. Dizziness (Placebo 4% vs. Wegovy Pill 8%)
One of the Wegovy pill adverse effects to look out for is dizziness, which can occur due to fluctuations in blood sugar. Although approved for weight loss, Wegovy can lower glucose levels as a side benefit. This, along with dehydration and reduced calorie intake, can reduce blood pressure and cause lightheadedness.
How to manage:
Stand slowly and eat your meals at the right times. If you have high blood sugar, monitor your glucose at home to keep it stable.
10. Abdominal Distension (Placebo 5% vs. Wegovy Pill 7%)
Slower digestion can cause gas to accumulate in your stomach, leading to gas and bloating with Wegovy pill, and a swollen feeling in your abdomen.
How to manage:
Avoid carbonated beverages, such as sodas, energy drinks, and sparkling water, during the treatment. Eat slowly and chew your food with your mouth closed to prevent excess air from being swallowed.
The list of Wegovy pill side effects also includes symptoms that affect only a small number of users.
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- Eructation or burping (placebo <1% vs. Wegovy pill 7%)
- Low blood sugar or hypoglycemia in people with type 2 diabetes (placebo 2% vs. Wegovy pill 6%)
- Flatulence or farting (placebo 4% vs. Wegovy pill 6%)
- Gastroenteritis or stomach flu (placebo 4% vs. Wegovy pill 6%)
- Gastroesophageal reflux disease (placebo 3% vs. Wegovy pill 5%)
- Gastritis (placebo 1% vs. Wegovy pill 4%)
- Viral gastroenteritis (placebo 3% vs. Wegovy pill 4%)
- Hair loss (placebo 1% vs. Wegovy pill 3%)
- Dysesthesia (placebo 1% vs. Wegovy pill 2%)
Taking Wegovy pill doesn’t mean you’ll experience all of these symptoms. Oral semaglutide affects each person differently. Some people may experience mild nausea during the first month, while others may experience vomiting. What’s certain is that most of these side effects of Wegovy pill are temporary and improve as your body adjusts to the drug’s effects.
If the symptoms persist, check in with your doctor to rule out underlying health concerns.
When Common Side Effects Start and How Long They Last
These side effects typically follow a predictable timeline.
First 1-4 Weeks: Adjustment Phase
During the first month of treatment, the gastrointestinal side effects of Wegovy pill are at their strongest. You may experience nausea, fatigue, diarrhea, and other digestive issues. These changes indicate that your body is adjusting to semaglutide’s delayed gastric emptying and appetite suppression.
Weeks 5-12: Stabilization Phase
Most people begin to tolerate the medication better in their second month of treatment. Nausea and other Wegovy pill adverse effects may be less frequent. Energy levels often improve, and you may notice fewer digestive symptoms.
Weeks 13-Onward: Maintenance Phase
At this point, most people have fully adjusted to the drug’s effects. They may no longer get nauseated or experience other gastrointestinal symptoms unless the dose is increased. Persistent severe side effects are uncommon during this period.
Overall, nausea, bloating, or stomach discomfort are often temporary and improve as your body adjusts. However, some side effects of oral semaglutide for weight loss, such as gallbladder issues or vision-related changes in people with diabetes, can persist and require medical monitoring.
Rare But Serious Side Effects of Wegovy Pill
Although rare, oral semaglutide can cause serious side effects requiring medical attention.
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- Acute pancreatitis: The risk of pancreatitis on Wegovy pill is high among patients with a prior history of pancreatitis. Close monitoring is required.
- Severe gastrointestinal adverse reactions: Around 2% of Wegovy tablet users in clinical trials reported experiencing severe digestive symptoms such as severe nausea, vomiting, or abdominal pain.
- Acute gallbladder disease: In clinical trials, 2.5% of Wegovy pill users (about 1 in 40) developed gallbladder problems.
- Hypoglycemia: Long-term side effects of Wegovy pill can include severe low blood sugar, especially in people taking insulin.
- Hypersensitivity reactions: There’s a reported risk of severe allergic reactions to Wegovy tablets. Monitoring is required for patients who may be sensitive to semaglutide or its inactive ingredients.
- Acute kidney injury: People with compromised kidney function are also at an increased risk of kidney problems with Wegovy pill.
- Diabetic retinopathy complications in patients with type 2 diabetes: Clinical trials documented up to 1.9% risk of moderate-to-severe non-proliferative retinopathy and 0.4% for proliferative retinopathy (a more serious form).
- Heart rate increase: Some users reported increased heart rate after taking oral semaglutide for weight loss.
- Suicidal behavior and ideation: Health experts caution against using Wegovy tablets in people with a history of depression or other mental health conditions.
- Pulmonary aspiration: There’s a risk of food, saliva, or liquid entering the lungs during general anesthesia or deep sedation in people undergoing surgery.
How to Reduce the Side Effects of Wegovy Pill
The strategies for managing side effects are the same for oral and injectable semaglutide. Here are some tips:
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- Eat smaller, slower meals to reduce stomach pressure.
- Drink lots of water, especially if you experience diarrhea or vomiting.
- Avoid foods that worsen nausea and digestive discomfort, such as fried, greasy, and spicy foods.
- Follow the prescribed dose titration schedule. Never increase or decrease your dose without your doctor’s guidance.
- Take the Wegovy pill at the same time each day as instructed.
Talk to your doctor for personalized tips. If you have conditions that limit your food options, such as chronic high blood sugar, talk to a diabetes nutritionist for a customized meal plan.
Wegovy Oral Side Effects vs. Injection: Is There a Difference?
Based on the FDA label, Wegovy tablets cause similar types and frequencies of side effects as Wegovy injections. The only difference is that injectable semaglutide may cause skin issues at the injection site, such as rash or swelling. On the other hand, since tablets are taken on an empty stomach, the risk of gastrointestinal side effects may be higher.
If you’re weighing your options between an injection and a pill, this skin sensitivity concern is important to consider, especially for people with existing skin conditions.
When to See a Doctor
Check in with your doctor or seek emergency care if you experience the following side effects on Wegovy tablets:
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- Persistent nausea, vomiting, or diarrhea is preventing you from eating or drinking normally.
- Severe abdominal pain that may radiate to the back, indicating pancreatitis.
- Symptoms of gallbladder problems, such as pain in the upper right abdomen, fever, or yellowing of the skin or eyes.
- Blurry vision or vision loss, especially if you have type 2 diabetes.
- Allergic reactions, including swelling, rash, breathing difficulty, or severe dizziness.
Oral Wegovy side effects can affect each person differently. If you notice an unexpected side effect, contact your doctor immediately to determine its cause.
Bottom Line
Most common side effects of Wegovy pill, such as nausea and vomiting, are mild and short-lived. They decrease in severity and frequency as your body adjusts to treatment. You can manage the symptoms by avoiding food triggers, eating small meals, and sipping fluids throughout the day.
Although rare, oral Wegovy can also cause severe side effects, such as gallbladder disease, pancreatitis, and severe allergic reactions. If a mild symptom suddenly gets worse or persists for months, schedule a consultation with your doctor to rule out underlying causes.
Many people tolerate Wegovy tablets well and benefit from their weight loss effects. But you should always work closely with your doctor to manage symptoms safely and ensure the medication remains appropriate for your individual health needs.
Frequently Asked Questions
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Sources
Eli Lilly and Company. (2025). ZEPBOUND® (tirzepatide) injection, for subcutaneous use: Highlights of prescribing information [PDF]. U.S. Food and Drug Administration. https://www.accessdata.fda.gov/drugsatfda_docs/label/2025/217806s031lbl.pdf
Cleveland Clinic. (2022, April 29). Lipohypertrophy: Symptoms, causes, treatment & prevention. https://my.clevelandclinic.org/health/diseases/22928-lipohypertrophy
