Overview A Four-Week Study Comparing Acetaminophen Extended Release and Rofecoxib in the Treatment of Osteoarthritis of the Knee Status: Completed Trial end date: 2000-10-01 Target enrollment: Participant gender: Summary To compare acetaminophen (Tylenol) with rofecoxib (Viox) for the treatment of Osteoarthritis of the Knee Phase: Phase 3 Details Lead Sponsor: Johnson & Johnson Consumer and Personal Products WorldwideTreatments: AcetaminophenRofecoxib