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Analgesic Efficacy and Management of Opioid-induced Constipation (OIC) for Uncontrolled Moderate - Severe Low Back Pain

This study has been completed.
Information provided by (Responsible Party):
Purdue Pharma LP Identifier:
First received: August 30, 2011
Last updated: November 6, 2014
Last verified: November 2014
The primary objective is to assess the efficacy of oxycodone/naloxone (OXN) for the management of opioid-induced constipation (OIC) compared to oxycodone controlled-release tablets (OXY) in subjects with moderate to severe low back pain and OIC who require around-the-clock opioid therapy.

Condition Intervention Phase
Low Back Pain Drug: Oxycodone/Naloxone controlled-release Drug: Oxycodone HCl controlled-release Drug: Placebo Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: A Randomized, Double-blind, Double-dummy, Placebo-controlled, Active-controlled, Parallel-group, Multicenter Trial of Oxycodone/Naloxone Controlled-release Tablets (OXN) to Assess the Analgesic Efficacy (Compared to Placebo) and the Management of Opioid-induced Constipation (Compared to Oxycodone Controlled-release Tablets (OXY)) in Opioid-experienced Subjects With Uncontrolled Moderate to Severe Chronic Low Back Pain and a History of Opioid-induced Constipation Who Require Around-the-clock Opioid Therapy

Resource links provided by NLM:

Further study details as provided by Purdue Pharma LP:

Primary Outcome Measures:
  • Overall complete spontaneous bowel movement (CSBM) responder rates [ Time Frame: Weeks 1 through 12 ]
    The overall Complete Spontaneous Bowel Movement (CSBM) responder rates over the 12 week double-blind period comparing OXN to OXY

Secondary Outcome Measures:
  • CSBM Responder at least 50% of the weeks in the double-blind period [ Time Frame: Weeks 1 through 12 ]
  • Laxative-free Responder at least 50% of the weeks in the double-blind period [ Time Frame: Weeks 1 through 12 ]

Enrollment: 455
Study Start Date: August 2011
Study Completion Date: October 2014
Primary Completion Date: October 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: OXN
Oxycodone/Naloxone controlled-release tablets (OXN)
Drug: Oxycodone/Naloxone controlled-release
Oxycodone/Naloxone controlled-release tablets (10/5 - 40/20 mg) taken orally every 12 hours
Active Comparator: OXY
Oxycodone HCl controlled-release tablets (OXY)
Drug: Oxycodone HCl controlled-release
Oxycodone HCl controlled-release tablets (10 - 40 mg) taken orally every 12 hours
Other Name: OxyContin
Placebo Comparator: Placebo
Placebo tablets to match OXN or OXY
Drug: Placebo
Placebo tablets to match OXN or OXY taken orally every 12 hours


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria include:

  • Male and female subjects ≥ 18 years of age with moderate to severe, chronic low back pain (lasting at least several hours daily) as their predominant pain condition for at least 3 months prior to screening period;
  • The low back pain must be related to nonmalignant and nonneuropathic conditions and may be with or without radiation;
  • Subjects must have a self-reported history of opioid induced constipation (OIC).

Exclusion Criteria include:

  • Subjects with rheumatoid arthritis or other inflammatory arthritis;
  • Subjects with neuropathic conditions that have been painful or required therapy within the past 3 months;
  • Subjects with evidence of significant structural abnormalities of the gastrointestinal (GI) tract or other significant conditions affecting GI motility;
  • Subjects with chronic constipation not related to opioid use;
  • Subjects who had surgical procedures directed towards the source of chronic low back pain within 6 months of the screening visit or planned during the study;
  • Subjects with a history of malignancy within the past 2 years, with the exception of basal cell carcinoma that has been successfully treated.

Other protocol specific inclusion/exclusion criteria may apply.

  Contacts and Locations
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Please refer to this study by its identifier: NCT01427270

  Show 194 Study Locations
Sponsors and Collaborators
Purdue Pharma LP
  More Information

Responsible Party: Purdue Pharma LP Identifier: NCT01427270     History of Changes
Other Study ID Numbers: ONU3704
2011-005060-26 ( EudraCT Number )
Study First Received: August 30, 2011
Last Updated: November 6, 2014

Keywords provided by Purdue Pharma LP:
Low back pain
Chronic pain
Moderate to severe chronic low back pain

Additional relevant MeSH terms:
Back Pain
Low Back Pain
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms
Signs and Symptoms, Digestive
Analgesics, Opioid
Central Nervous System Depressants
Physiological Effects of Drugs
Sensory System Agents
Peripheral Nervous System Agents
Narcotic Antagonists processed this record on September 21, 2017