Pregabalin and Orofacial Neuropathic Pain (Pregabalin-Dao)

This study has been terminated.
(difficulty to recruit patients)
Sponsor:
Collaborator:
Pfizer
Information provided by:
University of Toronto
ClinicalTrials.gov Identifier:
NCT00852436
First received: November 6, 2008
Last updated: February 15, 2011
Last verified: November 2010
  Purpose

The purpose of this study is to determine whether pregabalin can decrease pain and improve quality of life in patients who have nerve pain on the mouth or the face


Condition Intervention Phase
Neuralgia
Orofacial Pain
Drug: pregabalin
Drug: placebo
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Efficacy of Pregabalin in the Treatment of Orofacial Neuropathic Pain

Resource links provided by NLM:


Further study details as provided by University of Toronto:

Primary Outcome Measures:
  • Pain intensity [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Pain unpleasantness [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • Quality of life using the modified short form of Oral health Impact Profile [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • Anxiety and Depression measured with the Hospital Anxiety and Depression Rating scae [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • Patient global impression of change [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • Proportion of patients with 30% and 50% reduction of pain [ Time Frame: 2 years ] [ Designated as safety issue: No ]
  • Side effects [ Time Frame: 12 weeks ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 64
Study Start Date: February 2009
Estimated Study Completion Date: August 2011
Estimated Primary Completion Date: July 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
Pregabalin capsules in 75 mg, administered orally one (or two, or four) capsule(s), twice daily. Dosing increment from 150, 300, to 600mg/day at weekly intervals.
Drug: pregabalin
Pregabalin capsules in 75 mg,dosing increment from 150, 300, to 600mg/day at weekly intervals,administered orally one (or two, or four) capsule(s), twice daily. Fixed schedule of dosing increment from 150, 300, to 600mg/day at weekly intervals, until the highest tolerated dose has been reached. A single downward dose titration will be allowed depending on tolerability, after which the patient will remain on this dosage for the rest of the study.
Other Name: Lyrica
Placebo Comparator: 2
Placebo capsules in 75 mg, administered orally one (or two, or four) capsule(s), twice daily. Dosing increment from 150, 300, to 600mg/day at weekly intervals.
Drug: placebo
Placebo capsules in 75 mg,dosing increment from 150, 300, to 600mg/day at weekly intervals,administered orally one (or two, or four) capsule(s), twice daily. Fixed schedule of dosing increment from 150, 300, to 600mg/day at weekly intervals, until the highest tolerated dose has been reached. A single downward dose titration will be allowed depending on tolerability, after which the patient will remain on this dosage for the rest of the study.
Other Name: Placebo

Detailed Description:

Neuropathic pain (NP) is defined as pain initiated or caused by a primary lesion or dysfunction in the nervous system. At the trigeminal area where somatosensory nerves are often damaged during dental /maxillofacial interventions, post-operative orofacial neuropathic pain (OFNP) estimated treated prevalence/incidence rates were ~3-12%, with 83% of patients reporting that OFNP started with a dental treatment. Although OFNP is a burden for the society, and a major cause of chronic distress, disability and expenditure of medical resources, clinical trials that assess efficacy of its treatment are scarce. Until today, treatments of OFNP are extrapolated from those issued for neuropathic pain in other body sites. This clinical trial will be the first to evaluate the efficacy, safety, and tolerance of pregabalin in the treatment of OFNP. Based on the results obtained for neuropathic pain on non trigeminal areas, we expect to see positive results, and to provide evidence for effective management of OFNP with an anticonvulsant such as pregabalin.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Patients 18 years of age or older, males and females
  • history of dental and/or maxillofacial treatment/surgery that may cause nerve injury (e.g. root canal treatment, implant placement, deep restorations, tooth extractions, injection of anesthetics)
  • patients who score 12 on the validated self-report version of the Leeds Assessment of Neuropathic Symptoms and Signs pain scale (S-LANSS; Bennett et al. 2005) for extra-oral sites, or 9 for intra-oral sites (the scoring for extra-oral sites is taken as suggested; for intra-oral sites, the 5-point scoring for question 2 has been removed and the score proportionally adjusted, since it is difficult for patients to see color changes in their mouth)
  • pain rated 4 or more on a numerical scale (0 being no pain, 10 being the most intense pain imaginable), on a daily basis
  • pain lasting more than 6 months
  • absence of identifiable organic lesion, inflammation or infection
  • normal serum creatinine
  • reports that current and previous pain medications failed to provide adequate relief (e.g., analgesic, non-steroidal anti-inflammatories, opioids, antidepressants)
  • if currently using medication, acceptance of a wash-out period of at least one week, during which only Tylenol can be used as rescue medication
  • able to use the Palm handheld device to report daily pain

Exclusion Criteria:

  • lactating, pregnancy (potentially child bearing patients need to have a referral from family physician stating that the patient is not expecting or to be using contraception)
  • renal impairment or renal failure (contra-indication to pregabalin)
  • congestive heart failure or liver disease
  • currently suffering from trigeminal neuralgia
  • history of mental disorder, widespread pain or other severe pain conditions that may confound the pain assessment (e.g. depression, chronic fatigue, migraine headaches, fibromyalgia, severe chronic pain conditions)
  • intolerance or allergy to gabapentin and pregabalin
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00852436

Locations
Canada, Ontario
Dr. P. Watson's office
Etobicoke, Ontario, Canada, M9V 4B8
University of Toronto
Toronto, Ontario, Canada, M5G1G6
Sponsors and Collaborators
University of Toronto
Pfizer
Investigators
Principal Investigator: Thuan Dao, PhD University of Toronto
  More Information

No publications provided

Responsible Party: Thuan Dao, DMD, MSc, PhD, FRCD(C), University of Toronto
ClinicalTrials.gov Identifier: NCT00852436     History of Changes
Other Study ID Numbers: Dao-Watson Pregabalin
Study First Received: November 6, 2008
Last Updated: February 15, 2011
Health Authority: Canada: Health Canada

Keywords provided by University of Toronto:
neuropathic pain
orofacial pain
clinical trials
pregabalin
randomized controlled trial

Additional relevant MeSH terms:
Neuralgia
Nervous System Diseases
Neurologic Manifestations
Neuromuscular Diseases
Pain
Peripheral Nervous System Diseases
Signs and Symptoms
Pregabalin
Analgesics
Anticonvulsants
Calcium Channel Blockers
Cardiovascular Agents
Central Nervous System Agents
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Sensory System Agents
Therapeutic Uses

ClinicalTrials.gov processed this record on October 21, 2014