Efficacy and Safety Study of Naproxcinod in Subjects With Osteoarthritis of the Hip

Inclusion Criteria: * Men and women (40 or older) with a diagnosis of primary OA of the hip * Must be a current chronic user of NSAIDS or acetaminophen * Must discontinue all analgesic therapy at Screening Exclusion Criteria: * Uncontrolled Hypertension or Diabetes * Hepatic or renal impairment * Current or expected use of anticoagulant * Clinically relevant abnormal ECG * A history of alcohol or drug abuse * Diagnosis of gastric or duodenal ulceration and/or history of significant gastro-duodenal bleeding, within the last 6 months * Current medical disease, including arthritic, that could confound or interfere with the evaluation of efficacy * Candidates for imminent joint replacement * Participation within 30 days prior to screening in another investigational study