Bioequivalence Study Between Two Oral Formulations of Naproxen 500 mg Tablets Under Fasting Conditions

Inclusion Criteria: * healthy men or women, non-smoker, 18 years of age or older * willing to participate and sign a copy of the informed consent form Exclusion Criteria: * clinically significant illnesses or surgery within 4 weeks prior to study dosing * body mass index greater than or equal to 30.0 * recent history of drug or alcohol addiction or abuse * pregnant or lactating women * history of allergic response to naproxen, NSAIDs, or other related drugs, or to heparin * history of allergic reactions such as asthma, rhinitis, nasal polyps, urticaria, and hypotension associated with the use of aspirin or other NSAIDs * history or known presence of gastrointestinal ulceration, bleeding and perforation * use of tobacco products within 6 months prior to study dosing * evidence of a clinically significant disorder or whose laboratory results were deemed to be clinically significant * receipt of any drugs as part of a research study within 30 days prior to study dosing