How Long Does Wegovy Stay in Your Body?
Wegovy (semaglutide) has a half-life of about 1 week, meaning it takes roughly 7 days for half the drug to clear from your bloodstream after a dose.[1][2] Full elimination typically occurs after 5-7 half-lives, or 5-7 weeks, though this varies by individual factors like kidney function and dosage.[3]
What Affects How Long It Stays?
Age, liver or kidney issues, and body weight influence clearance. In people with mild kidney impairment, half-life extends slightly to 8 days; severe cases haven't been fully studied but may prolong effects.[2] Steady-state levels build over 4-5 weeks of weekly dosing, so stopping suddenly can leave detectable drug for over a month.[1]
How Long Do Effects Last After Stopping?
Weight loss benefits may persist 8-12 weeks post-last dose due to the drug's long action, but appetite suppression and blood sugar control fade within 4-6 weeks as levels drop below therapeutic thresholds.[3][4] Clinical trials show average weight regain of 2/3 within a year off treatment.[5]
When Is It Detectable in Tests?
Blood or urine tests can detect semaglutide for 4-6 weeks after the last dose, based on its pharmacokinetics—longer than shorter GLP-1 drugs like liraglutide (3-day half-life).[2][6] It's not typically screened in standard drug tests.
Wegovy vs. Other GLP-1 Drugs
| Drug | Half-Life | Time to Full Clearance |
|------|-----------|------------------------|
| Wegovy (semaglutide) | 7 days | 5-7 weeks [1] |
| Ozempic (semaglutide) | 7 days | 5-7 weeks [1] |
| Mounjaro (tirzepatide) | 5 days | 4-5 weeks [7] |
| Trulicity (dulaglutide) | 5 days | 4-5 weeks [8] |
| Saxenda (liraglutide) | 13 hours | 3-5 days [9] |
Wegovy's longer duration supports once-weekly dosing but increases "washout" time if switching drugs.[3]
Risks of It Lingering Too Long
Prolonged exposure raises risks like nausea, vomiting, or rare pancreatitis if doses overlap during switches. No major accumulation occurs in healthy users, but consult a doctor for abrupt stops, especially with kidney issues.[2][4]
[1]: FDA Wegovy Label
[2]: Novo Nordisk Pharmacokinetics
[3]: Drugs.com Semaglutide
[4]: NEJM STEP Trials
[5]: JAMA Weight Regain Study
[6]: PubMed Semaglutide PK
[7]: FDA Mounjaro Label
[8]: FDA Trulicity Label
[9]: FDA Saxenda Label