By John Ostapkovich
http://philadelphia.cbslocal.com/2013/12/16/popular-over-the-counter-drug-can-be-dangerous-when-taken-too-often/
Daniel Hussar, professor of Pharmacy at the University of the Sciences in Philadelphia, says the maximum adult dose is 4,000 milligrams a day, so if youre popping two 500 mg pills every six hours, you are maxed out.
http://philadelphia.cbslocal.com/2013/12/16/popular-over-the-counter-drug-can-be-dangerous-when-taken-too-often/