A Study To Assess The Ability Of A Crossover Study Design To Detect The Efficacy Of Pregabalin In Post-Traumatic Neuropathic Pain Patients

Methodology Study To Assess The Ability Of A Randomized, Double-Blind, Placebo-Controlled, Two Period Crossover Study To Detect The Effect Of Pregabalin In Post-Traumatic Neuropathic Pain Patients

The purpose of this study is to assess whether a cross-over type study design in post-traumatic neuropathic patients can be used to assess the activity of potential analgesic agents

Methodology study to evaluate a cross-over study design in post-traumatic neuropathic pain patients.

Inclusion Criteria:

• Patients require a diagnosis of post-traumatic peripheral neuropathic pain (NeP), including post-surgical NeP and NeP due to peripheral nerve injury, which has lasted at least 3 months following the traumatic event.
• Patients during the screening week must have completed ≥ 4 daily pain scores and have an average daily pain score ≥ 4.
• Female patients of childbearing potential must have a negative urine pregnancy test at Screening and be practicing an acceptable form of contraception.

Exclusion Criteria:

• Patients with neuropathic pain (NeP) that is not due to trauma; e.g. patients with trigeminal neuralgia, central pain, complex region pain syndrome type I, phantom limb pain, radiculopathy, painful diabetic neuropathy or post-herpetic neuralgia or patients with any other co-existing pain which cannot be differentiate from NeP of peripheral origin.
• Patients who have previously failed to respond to pregabalin at a total daily dose of equal to or greater than 300 mg or are intolerant to those doses.
• Patients who have previously failed to respond to gabapentin at a total daily dose of equal to or greater than 1800 mg.
• Patients with any type or history of malignancy, except either where there has been no ongoing treatment for at least 6 months or all basal cell carcinomas; all patients with a history of brain or spinal tumors will be excluded.
• Patients who currently have ongoing litigation related to any injury affecting their pain symptomatology.