Overview Safety of BTDS in Subjects With Osteoarthritic (OA) Pain of Hip or Knee: A 6-Month Open-label Extension Phase Status: Completed Trial end date: 2004-07-01 Target enrollment: Participant gender: Summary The purpose of the extension phase is to evaluate the long-term safety and tolerability of buprenorphine transdermal system (BTDS). Phase: Phase 3 Details Lead Sponsor: Purdue Pharma LPTreatments: Buprenorphine