Safety and Efficacy of 333369 in the Treatment of Partial Epilepsy

Inclusion Criteria: 1. Age 18-70 years old, 2. Diagnosis of epilepsy for at least 1 year, 3. Presenting, on average, at least 3 partial onset seizures per month, 4. Currently treated with a stable dose (i.e., for at least 4 weeks) of no more than 3 anti-epileptic drugs (AEDs), Exclusion Criteria: 1. Have experienced status epilepticus in the past 3 months, 2. Have any serious diseases, 3. History of major psychiatric disorders within the past 2 years. 4. Have received an experimental drug/device within the past 30 days 5. Are pregnant or breastfeeding.