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semaglutide (Wegovy) and nausea: incidence, timing, management, and when to escalate.
Onset is usually within 24-48 hours after the first injection at each new dose step. Tapers within 1-2 weeks at the same dose. Most patients have peak nausea between weeks 4 and 8.
Semaglutide delays gastric emptying. Food sits longer in the stomach, triggering the chemoreceptor trigger zone. The effect is dose-dependent, which is why titration helps.
Smaller meals, lower-fat foods, slow eating. Stop eating at the first sign of fullness. Avoid carbonation. Ginger or peppermint tea help some patients. If nausea is unmanageable, your prescriber may extend a dose step (hold at the current dose another 4 weeks).
Persistent vomiting beyond 48 hours, inability to keep fluids down, signs of dehydration (dizziness, dark urine), or abdominal pain that radiates to the back. These require same-day medical contact.
Nausea is the dominant Wegovy side effect and the main reason for discontinuation in the first three months. The good news: most patients adapt by month four. Slowing titration is more effective than anti-nausea meds for chronic management.
Editorial summary, not medical advice. Incidence figures from FDA prescribing information and pivotal trial publications. Individual experience varies. Coordinate side effect management with your prescriber.