How long does Adalimumab Injection stay in your system?
Last updated September 7, 2026.
**Most adalimumab leaves your system in about 2 to 3 months after your last injection.** Its half-life averages about 2 weeks, meaning the amount in your body drops by half during that time. Based on the reported half-life range of 10 to 20 days, clearing most of the medicine takes an estimated 50 to 100 days. Your dose, other medicines, and how quickly your body clears adalimumab affect the timing. This estimate does not tell you exactly when its immune effects end or when symptoms might return. Keep a record of your injections and ask your prescriber before stopping treatment or changing your schedule.
What to do
- **Record your doses:** Keep your last injection date and dosing schedule available for your care team.
- **Discuss treatment changes:** Ask your prescriber before stopping, restarting, or spacing out your injections.
- **Report infection symptoms:** Contact your care team promptly for fever, a persistent cough, or painful urination.
- **Check vaccine timing:** Ask your clinician when a live vaccine is safe after your last dose.
- **Plan for surgery:** Tell your surgeon and prescriber that you use adalimumab so they can coordinate your dosing.
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