Question: how long does it take to get naproxen out of your system?
Answer: 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).