This research study is being done to see the effectiveness and safety of a new drug called BHV-7000 as a possible treatment for focal seizures for patients who are taking anti-seizure medications (ASMs) and still experience seizures. Participation in this study is expected to last approximately 18 to 20 weeks, or about 4 months.

This research study is being done to see the long term effectiveness and safety of a new drug called BHV-7000 as a possible treatment for focal seizures for patients who are taking anti-seizure medications (ASMs) and still experience seizures. You could be eligible to participate in the study if you completed the first double blind study successfully and your study doctor see's that you meet all the criteria for this study.