A Study Comparing the Effectiveness and Safety of Extended Release Tramadol HCl at 100 mg, 200 mg and 300 mg Doses to Placebo for the Treatment of Moderate to Severe Pain Due to Osteoarthritis (OA)

Chronic Pain Clinical Trial

Official title: Double-blind, Randomized, Dose-ranging, Parallel-group Comparison of the Efficacy and Safety of Extended Release Tramadol Hydrochloride (Tramadol HCl ER) 100 mg, 200 mg, 300 mg, Celecoxib 200 mg and Placebo in the Treatment of Osteoarthritis of the Knee and/or Hip.

Status Completed

Clinical Trial Summary

The purpose of this study is to compare the analgesic efficacy and safety of tramadol HCl ER 100 mg, 200 mg and 300 mg once a day (QD), with placebo in patients with moderate to severe pain due to OA. For the purposes of this study, celecoxib will serve as a positive control to validate the sensitivity of the model. The study hypothesis is that tramadol HCl ER is safe and effective in the treatment of moderate to severe pain due to OA.

Clinical Trial Description

Immediate release (IR) tramadol has demonstrated efficacy in several pain conditions including, obstetrical, gynecological, orthopedic, abdominal, and oral surgery. The short elimination half-life of IR tramadol necessitates every 4-6 hour dosing to maintain optimum levels of analgesia in chronic pain. The study medication in this study is a once-daily, extended release (ER) tramadol formulation. This is a 12-week multicenter, double-blind, randomized, dose-ranging, placebo and positive-controlled, parallel-group study. For the purpose of this study, celecoxib serves as a positive control to validate the sensitivity of the model. Patients with OA functional Class I-III of the knee or hip, with moderate to severe pain are eligible for participation, if appropriate criteria are met. During a 2-7 day washout period, the use of all analgesic medications will be discontinued. Eligible patients experiencing moderate to severe pain (>= 40 mm on a 100 mm visual analog scale) in the index joint to be evaluated and who meet all other study criteria will enter the double-blind titration period. During this period, patients will be randomly assigned to receive treatment with tramadol HCl ER 100 mg, 200 mg, 300 mg, celecoxib 200 mg or placebo, once daily. During the titration period (Days 1-9) all patients will be contacted by phone every few days to ensure they do not experience unmanageable pain or unacceptable side effects. Efficacy and safety evaluations will be collected at study visits occurring at Weeks 1, 2, 3, 6, 9 and 12 or at the time of early termination. Study medication will be discontinued at Week 12 and patients will return after 1 week for a post-treatment visit (Week 13). ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double-Blind, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Chronic Pain
• Osteoarthritis

• NCT number: NCT00348452
• Study type: Interventional
• Source: Valeant Pharmaceuticals International, Inc.
• Status: Completed
• Phase: Phase 3
• Start date: September 2002
• Completion date: August 2003