Research study of pain as a result of nerve damage (also called neuropathic pain) that is related to your illness or condition. Illnesses or conditions include: multiple sclerosis, post-stroke pain, radiculopathy pain, and post-amputation pain. The purpose of this research study is to test the usefulness of levetiracetam for managing neuropathic pain in different types of illnesses or conditions. The drug being studied is not approved for use in people who have neuropathic pain. Levetiracetam is considered experimental in this study.
