Trial will evaluate the efficacy and safety of pregabalin in the treatment of 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.