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How long does naproxen stay in system?

Answers (1)

6 Nov 2011

I realize this answer is very late but may be useful in future.

Naproxen has an elimination half life of 12 to 17 hours.

It takes 5.5 x elimination half life for a medicine to be cleared from ones system. So it'll be in your system for about 93.5 hours (5.5 x 17 hours).

http://www.drugs.com/pro/naprosyn.html

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