This open label study will consist of three phases: baseline, Double-blind treatment and open-label-treatment. There are 9 visits over 32 weeks. During the baseline period, the number of seizures will be recorded during 2 months while the patient is on a dose of antiseizure drug(s) that was previously established to provide better seizure control. Blood work, including blood for DNA baseline ECG and echocardiogram will be done and may be repeated if necessary. During the 3 months of double-blind treatment phase, verapamil/placebo will be added to the current medications. Visits are every 4 weeks. Vital signs, seizure counts and adverse events will be evaluated. All patients who received placebo will be offered 3 months of open-label treatment with verapamil.
