Trial of Efficacy and Safety of Pregabalin in Subjects With Neuropathic Pain Associated With Lumbo-Sacral Radiculopathy

Inclusion Criteria: * Pain consistent with a diagnosis of chronic lumbo-sacral radiculopathy due to spinal stenosis or disk herniation. * Radicular pain must be present for at least 3 months and pain stable for at least 4 weeks. Exclusion Criteria: * Surgery for lumbo-sacral radiculopathy within previous 6 months and/or more than one previous spinal surgery for pain-radiculopathy. * Epidural injection for lumbo-sacral radiculopathy within previous 6 weeks and/or anticipated need for treatment with opioid analgesics, anti-epileptic medications or tricyclic antidepressants to alleviate pain due to lumbo-sacral radiculopathy during the course of the study.