Quick Answer
Nausea is the most common side effect of semaglutide, affecting 20-30% of people. It usually appears in the first 1-2 weeks and improves significantly within 4 weeks.
Common (20-30% of users)
Why This Happens
Nausea occurs because semaglutide slows gastric emptying—your stomach empties food more slowly. This is how the drug helps with appetite control, but it can cause temporary nausea as your body adjusts.
If side effects are limiting your progress, a provider can adjust dosing or switch medications based on your response. The right medication match can make all the difference.
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Check Availability →Is It Serious?
Usually mild to moderate. Most people manage it with small meal portions and ginger tea. Severe nausea is rare and typically signals a dose that's too high.
When to Contact Your Doctor
- If nausea persists beyond 4 weeks or is severe, contact your doctor about reducing your dose.
- If you cannot eat or keep fluids down, seek immediate medical attention.