Wegovy® (Semaglutide) Safety Information
Important safety information for Wegovy® (semaglutide).
Safety information · Wegovy® (semaglutide) · Updated Jun 9, 2026
Before Using Wegovy®
Tell your healthcare provider about your full medical history, including if you have:
Kidney, liver, or pancreas problems
Severe gastrointestinal disease
A history of diabetic retinopathy
Depression, suicidal thoughts, or behavior changes
Discuss all prescription and non-prescription medications, vitamins, and herbal supplements you take, especially:
Insulin or insulin secretagogues (e.g., sulfonylureas)
Thyroid hormone medication
Medications with a narrow therapeutic range (e.g., warfarin)
Pregnancy, Breastfeeding & Contraception
Do not use if you are pregnant, planning to become pregnant, or breastfeeding.
Stop Wegovy® at least 2 months before trying to conceive.
Use effective contraception while on treatment.
Wegovy® may cause fetal harm.
Alcohol
Avoid alcohol while taking Wegovy®.
Serious Warnings: Call Your Doctor Immediately If You Experience:
Thyroid C-cell tumor symptoms (see Black Box Warning above)
Pancreatitis: severe abdominal or back pain that does not go away, with or without vomiting
Gallbladder disease: pain in the upper right stomach, fever, yellowing skin or eyes, nausea or vomiting
Kidney problems or failure: reduced urination, swelling, fatigue, especially if dehydrated from nausea, vomiting, or diarrhea
Hepatitis or elevated liver enzymes: yellowing skin or eyes, dark urine
Diabetic retinopathy changes: sudden vision changes
Serious allergic reaction: swelling of face, lips, tongue, or throat; difficulty breathing or swallowing; rash, itching, fainting, dizziness, or rapid heartbeat
Severe gastrointestinal issues
Hypoglycemia (especially if also taking insulin or sulfonylureas): dizziness, confusion, sweating, rapid heartbeat, shakiness, headache
Increased heart rate
Worsening depression or suicidal thoughts
If any of these occur, stop Wegovy® and seek immediate medical attention.
Common Side Effects
Some people experience no side effects. The most common include:
Nausea, vomiting, diarrhea, constipation, abdominal pain, bloating, belching, flatulence
Headache, dizziness, fatigue
Indigestion, upset stomach, acid reflux
Nasopharyngitis (common cold)
Back pain
Altered taste
Decreased appetite
Injection site reactions
Gastroenteritis
Increased lipase or amylase
Most side effects improve as your body adjusts. Contact your provider if symptoms persist.
Drug Interactions
Wegovy® may delay stomach emptying, which can affect absorption of oral medications.
Dose adjustments may be required for insulin, sulfonylureas, thyroid hormone, and medications with a narrow therapeutic index.
Monitor closely if on warfarin or other blood thinners.
Other Safety Notes
Stay hydrated to reduce risk of dehydration-related kidney issues.
Never share your Wegovy® pen with anyone, even if the needle is changed.
Emergency Information
In case of a medical emergency, call 911 or go to the nearest emergency room.
To report side effects, contact the FDA at 1-800-FDA-1088 or visit www.fda.gov/medwatch.
Education only, not medical advice.