INCLUSION CRITERIA:  Clinically proven cases of primary trigeminal neuralgia. Patients who are willing to participate in the study.  EXCLUSION CRITERIA:  Intolerance to either of the two drugs Medically compromised patients Patients with pacemaker Patients who have previously undergone surgical treatment for TRIGEMINAL NEURALGIA. Patients who are already on pharmacotherapy for TRIGEMINAL NEURALGIA. Seizure disorder/ pregnant/ lactating Renal/ hepatic impairment History of hyponatermia Concurrent medication- dilantin, phenytoin