What are the most common side effects of Wegovy?
The most common side effects of Wegovy are digestive and include nausea, vomiting, diarrhoea, constipation, stomach (abdominal) pain, and bloating. Headache and feeling weak or tired are also frequently reported. These effects are most likely when starting treatment or after a dose increase and usually settle as the body adjusts.
In UK practice, patients are advised to titrate the dose gradually and to seek medical advice if side effects are severe, persistent, or if there are signs of dehydration (such as dizziness or passing very dark urine).
- Most common: nausea, vomiting, diarrhoea, constipation, stomach pain, bloating.
- Other frequent effects: headache and feeling weak/tired.
- Side effects often happen when starting or increasing the dose, then usually improve over time.
- UK guidance typically uses gradual dose increases to limit side effects.
- Seek medical advice if symptoms are severe, don’t settle, or there are signs of dehydration.