Efficacy of Pregabalin in the Treatment of Orofacial Neuropathic Pain
试验速览
- 阶段
- 2 期
- 状态
- 终止
- 入组人数
- 1
- 试验地点
- 2
- 主要终点
- Pain intensity
研究概览
简要总结
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
详细描述
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •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
排除标准
- •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
研究组 & 干预措施
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.
干预措施: pregabalin (Drug)
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.
干预措施: placebo (Drug)
结局指标
主要结局
Pain intensity
时间窗: 12 weeks
次要结局
- Pain unpleasantness(12 weeks)
- Quality of life using the modified short form of Oral health Impact Profile(12 weeks)
- Anxiety and Depression measured with the Hospital Anxiety and Depression Rating scae(12 weeks)
- Patient global impression of change(12 weeks)
- Proportion of patients with 30% and 50% reduction of pain(2 years)
- Side effects(12 weeks)
研究者
Thuan Dao
Associate Professor
University of Toronto