People with diabetes can, over time develop nerve damage throughout the body with symptoms such as pain, tingling, or numbness (loss of feeling) in the hands, arms, feet and legs.

Inclusion Criteria

• Subject is between the ages of 18 to 75 years with a diagnosis of diabetes mellitus and must have a diagnosis of painful distal symmetric diabetic polyneuropathy and presence of ongoing pain due to diabetic peripheral neuropathy for at least 6 months.
• Subject must have an average score of greater than or equal to 4 on the 24 hour average pain score (0-10 numerical rating scale) collected over approximately 7 days prior to the Baseline Visit.

Exclusion Criteria

• Subject has clinically symptomatic neuropathic pain conditions that can not be distinguished from diabetic neuropathic pain or interfere with the pain assessments of diabetic neuropathic pain.
• A subject has newly diagnosed or clinically significant medical conditions or mental disorders that would preclude participation or would interfere with diabetic neuropathic pain assessments or other functions.
• Subject has clinically significant abnormalities in clinical laboratory tests.