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The primary objectives of this study are to characterize the dose-response relationship with respect to efficacy of PSL administered concomitantly with up to 3 anti-epileptic drugs (AEDs) for treatment of observable focal-onset seizures in subjects with drug-resistant epilepsy and to evaluate the efficacy of the 4 selected dose regimens of PSL compared with placebo. The secondary objective is to assess the safety and tolerability of all doses of PSL in relation to placebo.
Mohamad Koubeissi, MD