| A Study to Evaluate Buprenorphine Transdermal Patch in Chinese Subjects With Moderate to Severe Chronic Cancer Pain NCT03967327 | Unknown status | Phase 3 | China | Mundipharma (China) Pharmaceutical Co. Ltd | 2019-04-22 |
| Embrace TDD: Post-Market Study to Evaluate Intrathecal Morphine as an Alternative to Systemic Opioids for Chronic Pain NCT03761277 | Completed | Phase 4 | United States | MedtronicNeuro | 2019-01-16 |
| Effect of Intrathecal Morphine on Chronic Pain After Elective Caesarean Section NCT03451695 | Completed | Phase 4 | Nepal | B.P. Koirala Institute of Health Sciences | 2018-04-01 |
| Effect of Combined Morphine and Duloxetine on Chronic Pain NCT03249558 | Completed | Phase 4 | United States | Massachusetts General Hospital | 2018-03-12 |
| Efficacy and Safety Study of Gabapentin as add-on to Morphine in Paediatric Patients Affected by Chronic Pain NCT03275012 | Withdrawn | Phase 2 | | Pharmaceutical Research Management srl | 2017-04-04 |
| Sensory Effects of Oral Opioid Treatment in Patients With Chronic Low Back Pain NCT02824276 | Completed | Phase 1 | United States | Brigham and Women's Hospital | 2017-01-06 |
| Nasal Fentanyl for Chronic Cancer Pain NCT01906073 | Withdrawn | Phase 3 | | Norwegian University of Science and Technology | 2017-01 |
| Thoracic Paravertebral Block : Effect on Acute Pain and Chronic Pain of Hepatectomy With Right J-shape Subcostal Incision NCT02817321 | Completed | Not applicable | China | Cui Xulei | 2016-11 |
| Paravertebral Morphine Versus Dexmedetomidine on Acute and Chronic Postmastectomy Pain NCT02935933 | Unknown status | Phase 1, Phase 2 | Egypt | Assiut University | 2016-10 |
| Discontinuation vs Continuation of Long-term Opioid Therapy in Suboptimal and Optimal Responders With Chronic Pain NCT02741076 | Terminated | Phase 4 | United States | Member Companies of the Opioid PMR Consortium | 2016-09-14 |
| Reduced Opioid Analgesic Requirements Via Improved Endogenous Opioid Function NCT02469077 | Completed | Not applicable | United States | Vanderbilt University Medical Center | 2015-08 |
| NEUROIMPA - Intraarticular Application of Opioids in Chronic Arthritis of the Knee Joint NCT02967302 | Unknown status | Phase 2, Phase 3 | Germany | Hildrun Haibel | 2015-08 |
| The Effects of TAP Block on Postsurgical Pain After Minimally Invasive Partial Nephrectomy: NCT02460640 | Completed | Not applicable | Italy | Regina Elena Cancer Institute | 2015-05 |
| A Study to Look at Tapentadol Tablets in Children and Adolescents in Pain NCT02151682 | Completed | Phase 2, Phase 3 | Belgium, Bulgaria, Chile, France... | Grünenthal GmbH | 2015-04-29 |
| Effect of Locally Administered Morphine and Bupivicaine on Acute and Chronic Postmastectomy Pain NCT02462577 | Completed | Phase 2 | Egypt | Assiut University | 2015-01 |
| A Comparison of Morphine and Morphine Plus Dexmedetomidine in Chronic Cancer Pain NCT02289261 | Completed | Phase 4 | Turkey (Türkiye) | Cukurova University | 2014-11 |
| Effect of Guanfacine on Opioid-induced Hyperalgesia (OIH) and Tolerance NCT01681264 | Terminated | Phase 4 | United States | Massachusetts General Hospital | 2014-09 |
| The Effect of Intraoperative Ketamine on Opioid Consumption and Pain After Spine Surgery in Opioid-dependent Patients NCT02085577 | Completed | Phase 4 | Denmark | Copenhagen University Hospital, Rigshospitalet | 2014-05 |
| Efficacy of Topical Morphine in the Treatment of Severe Local Pain of Chronic Wounds NCT02028923 | Terminated | Phase 3 | France | Institut Curie | 2014-04 |
| CORAL - Cebranopadol Versus Morphine Prolonged-release in Patients With Chronic Moderate to Severe Pain Related to Cancer NCT01964378 | Terminated | Phase 3 | Austria, Belgium, Bulgaria, Chile... | Tris Pharma, Inc. | 2013-10-29 |
| Intrathecal Morphine Compared to Conventional Medical Management for Pain Control and Opioid-related Side Effects NCT01924182 | Terminated | Not applicable | United States | MedtronicNeuro | 2013-10 |
| Prediction of Inter-individual Differences in the Response to Morphine Versus Milnacipran in Patients With Sciatica NCT01914042 | Unknown status | Phase 2 | Israel | Rambam Health Care Campus | 2013-07 |
| Evaluation of the Tolerability of Switching Subjects on Chronic ATC Opioid Therapy to Buprenorphine HCl Buccal Film NCT01871285 | Completed | Phase 2 | United States | BioDelivery Sciences International | 2013-06 |
| Methadone in Neuropathic Pain NCT01205516 | Terminated | Phase 4 | Canada | Nova Scotia Health Authority | 2013-01 |
| Levobupivacaine Prolonged Wound Infusion for Postoperative Pain Relief After Breast Surgery NCT02035904 | Unknown status | Phase 4 | Italy | Fondazione IRCCS Policlinico San Matteo di Pavia | 2013-01 |
| The Effects of Apomorphine on Experimental and Clinical Pain in Patients With Chronic Radicular Pain NCT02969629 | Completed | Phase 4 | Israel | Rambam Health Care Campus | 2012-12 |
| Perioperative Pain Management In Spine Surgery Patients: Part I NCT01447888 | Completed | Not applicable | United States | Allina Health System | 2011-09 |
| The Clinical Evaluation of Implantable Pump System For Safety And Delivery Accuracy In Patients Requiring Intrathecal Administration Of Morphine Sulfate For Chronic Pain NCT01185470 | Completed | Phase 2, Phase 3 | United States | Medallion Therapeutics, Inc. | 2011-02 |
| Conversion to Embeda With Rescue Trial NCT01179191 | Terminated | Phase 4 | United States | Pfizer | 2010-08 |
| A Safety and Efficacy Study of Oral Tapentadol Extended-Release in Japanese Participants NCT01309386 | Completed | Phase 3 | Japan | Janssen Pharmaceutical K.K. | 2010-08 |
| Abuse Potential Assessment of Intranasally Administered EMBEDA Compared To Morphine Sulfate Controlled Release And Placebo NCT01595867 | Completed | Phase 1 | | Pfizer | 2010-08 |
| Safety Study to Assess Opiate Withdrawal Signs and Symptoms in Opioid Dependent Patients NCT01100437 | Terminated | Phase 4 | United States | Pfizer | 2010-04 |
| A Safety and Efficacy Study of Sufentanil Transdermal System in Patients With Chronic Pain Due to Cancer NCT00943566 | Withdrawn | Phase 2 | | Labtec GmbH | 2010-01 |
| Effect of Local Administration of Morphine for Analgesia After Iliac Bone Graft Harvest NCT01037335 | Withdrawn | Phase 4 | | The Cleveland Clinic | 2009-04 |
| Methadone, Morphine, or Oxycodone in Treating Pain in Patients With Cancer NCT00726830 | Terminated | Not applicable | United States | M.D. Anderson Cancer Center | 2009-03 |
| Prospective Study About Clinical and Pharmacogenetic Safety of Opioid Use for Chronic Pain NCT00916890 | Suspended | Phase 4 | Italy | Fondazione IRCCS Policlinico San Matteo di Pavia | 2009-02 |
| Opioid Treatment for Chronic Low Back Pain and the Impact of Mood Symptoms NCT01502644 | Completed | Phase 4 | United States | Brigham and Women's Hospital | 2009-02 |
| Evaluation of Risk Minimization, Assessment and Outcomes in Patients With Chronic Pain Taking Avinza NCT00640042 | Completed | Phase 4 | Puerto Rico, United States | Pfizer | 2008-03 |
| A Study to Evaluate Tapentadol (CG5503) in the Treatment of Chronic Tumor-Related Pain Compared With Placebo and Morphine NCT00472303 | Completed | Phase 3 | Austria, Bulgaria, Croatia, Czechia... | Grünenthal GmbH | 2007-07 |
| Effectiveness of Controlled-Release Morphine for Chronic Neuropathic Pain After Spinal Cord Injury NCT00488969 | Completed | Phase 2 | United States | Icahn School of Medicine at Mount Sinai | 2007-07 |
| A Study to Evaluate the Effectiveness and Safety of CG5503 (Tapentadol) in the Treatment of Chronic Tumor Related Pain Compared With Placebo and Morphine NCT00505414 | Terminated | Phase 3 | Argentina, Chile, France, Latvia... | Grünenthal GmbH | 2007-06 |
| Intrathecal Ketorolac in Patients With Intrathecal Morphine Dose Escalation NCT00349401 | Withdrawn | Phase 2 | | Wake Forest University Health Sciences | 2006-12 |
| Study of Embeda (Kadian NT, ALO-01) in Subjects With Chronic Moderate to Severe Nonmalignant Pain NCT00415597 | Completed | Phase 3 | United States | Pfizer | 2006-12 |
| A Study of Embeda (Kadian NT, ALO-01) in Subjects With Pain Due to Osteoarthritis of the Hip or Knee NCT00420992 | Completed | Phase 3 | United States | Pfizer | 2006-12 |
| Analgesia and Wound Healing Assessment Following Topical Morphine Applied to Patients With Cutaneous Cancer Related Pain NCT00306020 | Withdrawn | Not applicable | | Soroka University Medical Center | 2006-01 |
| A Comparison of the Addiction Liability of Hydrocodone and Sustained Release Morphine NCT00314340 | Completed | Phase 4 | | University of California, Davis | 2005-11 |
| Opiate-Induced Tolerance & Hyperalgesia in Pain Patients NCT00246532 | Completed | Phase 4 | United States | National Institute of General Medical Sciences (NIGMS) | 2005-10 |
| An Efficacy and Safety Study of Transdermal Therapeutic System (TTS)-Fentanyl in Thai Participants With Chronic Non-Malignant Pain NCT01816243 | Completed | Phase 4 | Thailand | Janssen-Cilag Ltd.,Thailand | 2004-04 |
| Treatment for Chronic Pain in Patients With Advanced Cancer NCT00003687 | Completed | Phase 3 | Canada | NCIC Clinical Trials Group | 1998-06-11 |
| Efficacy of Opioids and Mexiletine for the Treatment of Postamputation Pain NCT00383682 | Completed | Phase 2 | United States | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | 1997-07 |