A Randomized, Controlled Trial of Ganaxolone in Patients With Infantile Spasms

Male or female, 4 to 24 months of age (inclusive) with a diagnosis of IS with a 24 hour video EEG (vEEG) recording confirming the diagnosis and previously treated with 3 or fewer antiepileptic drugs (AEDs) are eligible for the study. The subject is able to continue treatment with concomitant AEDs (no more than 2; adrenocorticotropic hormone \[ACTH\], corticosteroids, felbamate, and vigabatrin are not allowed concomitantly). A ketogenic diet is permitted if it can be maintained for the duration of the study. There will be a total of three weekly 24-hr video EEGs (baseline, end of weeks 1 and 2 of treatment). Dosing titration begins the day after each video EEG during the inpatient stay. All subjects will be receiving ganaxolone the day after the second video EEG. A Data Monitoring Board (DMB) will determine whether successive cohorts of subjects can be dosed at an increased dose level; up to a maximum of 6 cohorts.