Study of Transcranial Direct Current Stimulation to Treat Epilepsy

Inclusion Criteria - Clinical diagnosis of generalized onset or focal epilepsy or sleep-related epileptic encephalopathy. - Estimated to have at least 2 countable seizures per month or spike-wave index ≥50%. - Has not had control with at least 2 anti-seizure medicines. - Able to maintain a constant medication for duration of the study (rescue meds allowed). - Subject or legally authorized representative is able to understand consent and keep a seizure diary in English. Who Should NOT Join This Trial: - A disease likely to progress over course of the study. - Psychogenic non-epileptic seizures. - Suicide attempt or psychiatric hospitalization past 2 years. - A skin condition interfering with scalp electrodes or allergy to silver. - Women will verify not pregnant, and if applicable, have a serum pregnancy test. - Implanted devices (e.g. pacemakers)-except VNS, which is allowed. Always talk to your doctor about whether this trial is right for you.