How Long Does Ozempic Stay in Your System?Semaglutide half-life and clearance — how long Ozempic stays in your system after the last dose, and what it means for pregnancy planning and stopping.

Short answer: Semaglutide's half-life is about 7 days, so it takes roughly 5–7 weeks to fully clear after your last dose. The FDA label advises women planning pregnancy to stop Ozempic at least 2 months before a planned pregnancy for complete clearance.

The pharmacokinetics

Half-life ~7 days → ~5 half-lives to clear = ~5 weeks. Steady state took ~4–5 weeks to build; clearance takes a similar window. Appetite effects fade over 1–2 weeks as levels fall.

Why this matters

Pregnancy planning — FDA label: discontinue ≥2 months before planned pregnancy
Surgery — some anesthesiologists prefer a hold for delayed gastric emptying; tell them you're on it
Switching meds — no washout needed between GLP-1s typically; your doctor decides
Side effects — persistent GI effects usually resolve as drug clears

Ozempic (semaglutide) FDA Prescribing Information, Novo Nordisk, 2024.

STEP 1 Trial — Once-Weekly Semaglutide in Adults with Overweight or Obesity (Wilding et al., NEJM 2021).

SUSTAIN 6 — Semaglutide and Cardiovascular Outcomes in Type 2 Diabetes (Marso et al., NEJM 2016).

American Diabetes Association — Standards of Care in Diabetes — 2026.

NICE Guideline NG28 — Type 2 diabetes in adults: management.

World Health Organization — Diabetes fact sheet.

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