How long does naproxen stay in your system?
Medically reviewed by Drugs.com. Last updated on Oct 27, 2020.

Official Answer
by Drugs.comAfter taking your last dose of naproxen it should be out of your system within 93.5 hours.
Naproxen has an elimination half life of 12 to 17 hours. This is the time it takes for your body to reduce plasma drug levels by half. It takes approximately 5.5 x elimination half-life for a drug to be eliminated from your system.
Therefore naproxen will be in your system for about 93.5 hours (5.5 x 17 hours).
For more information see:
Related Medical Questions
- Naproxen vs ibuprofen: What's the difference?
- What is the best way to reduce swelling in your face?
- Can NSAIDs be used to treat a COVID-19 fever?
- What is Apronax called in the USA?
Drug Information
- Naproxen Information for Consumers
- Naproxen Information for Healthcare Professionals (includes dosage details)
- Side Effects of Naproxen (detailed)
Related Support Groups
- Naproxen (143 questions, 258 members)