Overview Fentanyl Transdermal Matrix Patch ZR-02-01 to Treat Chronic, Moderate to Severe Osteoarthritis (OA) Pain Status: Completed Trial end date: 2006-09-01 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the effectiveness of the Matrix Fentanyl Patch ZR-02-01 in providing pain relief. Phase: Phase 2 Details Lead Sponsor: ZARS Pharma Inc.Treatments: Fentanyl