BHV-7000 Responsive Neurostimulation System (RNS) Study

This is an open-label proof-of-principle study to assess the biological effect BHV-7000 on epileptiform activity detected by the RNS System. The study uses a single case experimental design in a small number of participants. Following a 90-day retrospective baseline period, there is a 4-week treatment period followed by a 4-week withdrawal period. Objective electrophysiologic biomarkers will be obtained from patients' RNS and analyzed in each participant to assess patient-level efficacy. The primary objective of this study is to determine whether BHV-7000, a potassium channel activator, reduces the frequency of electrographic biomarkers of epileptic activity detected in patients with epilepsy who were implanted with the RNS System. Secondary objectives are assess whether BHV-7000 withdrawal in participants leads to subsequent worsening of electrographic biomarkers of seizures compared to the treatment period, and to assess the safety and tolerability of BHV-7000 in participants with epilepsy who have been implanted with RNS.