How much is too much naproxen?

[CindiW2]

I hear that naproxen may hurt one's kidneys, and surely I don't want that to happen. But the naproxen helps relieve some of my pain but I don't take it too often. So how much is too much?

[backhurtz]

Prescription doses of anti inflammatory meds such as naproxen or motrin are 600 mg, 800 mg, three times per day.