How Long Does Wegovy Stay in Your System?
Wegovy (semaglutide) has a half-life of about 1 week, meaning it takes roughly 7 days for half the drug to clear from your body after a dose.[1] Full elimination typically occurs after 5-7 half-lives, or 5-7 weeks, though traces may linger longer depending on individual factors.[2]
What Affects Clearance Time?
Kidney function, liver health, age, body weight, and dosage influence how quickly Wegovy leaves your system. People with reduced kidney clearance may take longer, up to 8 weeks or more.[1][3] Steady-state levels build after 4-5 weeks of weekly dosing, so stopping abruptly means levels drop gradually over 4-6 weeks.[2]
How Long Until Weight Loss Effects Stop?
Appetite suppression and weight loss benefits persist 4-8 weeks after the last dose as drug levels decline. Blood sugar control fades similarly in diabetics.[4] Restarting requires rebuilding to steady state over a month.
Detection in Blood, Urine, or Tests?
Semaglutide is detectable in blood for 4-6 weeks post-dose via specialized tests, but standard drug screens (like employment panels) do not test for it.[3] Urine detection is shorter, around 2-4 weeks, due to its peptide nature.[5]
What Happens If You Miss or Stop Doses?
Missing one dose delays peak effects by a week but doesn't require immediate catch-up. Stopping long-term leads to weight regain within months, with 2/3 of lost weight returning by year 1 in trials.[4] No acute withdrawal, but consult a doctor before quitting.
Compared to Ozempic or Other GLP-1 Drugs?
Wegovy and Ozempic both use semaglutide, so clearance is identical (1-week half-life).[1] Mounjaro (tirzepatide) clears faster at 5 days half-life; Saxenda (liraglutide) at 13 hours, requiring daily dosing.[2][6]
[1] Novo Nordisk Wegovy Prescribing Information
[2] FDA Label for Semaglutide
[3] Drugs.com Pharmacokinetics
[4] STEP Trials, NEJM
[5] Clinical Pharmacology Reviews
[6] DrugPatentWatch.com Semaglutide Patents