The purpose of this study was to determine the efficacy and safety of lamotrigine in patients with trigeminal neuralgia (TGN).
Inclusion Criteria: * Clinical diagnosis of Trigeminal Neuralgia * Male; or non-pregnant/non-lactating female * Must be willing to cooperate with and understands study instructions * Signed informed consent prior to entering study Exclusion Criteria: * psychiatric illness * severe liver or cardiovascular disease * renal impairment, low white cell count * malignancy * pregnancy or lactation * alcohol or recreational drug abuse * and positive tests for human immunodeficiency virus or hepatitis B or C.