A Double-blind, Placebo-controlled Study of Levetiracetam in Epilepsy Patients With Generalized Tonic-clonic Seizures (Except Partial Seizures Evolving to Secondarily Generalized Seizures)

A Double-blind, Multicenter, Randomized, Placebo-controlled Study to Evaluate the Efficacy and Safety of Adjunctive Treatment With Oral Levetiracetam, in Epilepsy Patients Aged ≥16 Years, With Generalized Tonic-clonic (GTC) Seizures

The purpose of this study is to evaluate the efficacy, safety and tolerability of levetiracetam treatment used as adjunctive therapy in Japanese and Chinese epilepsy patients aged ≥16 years and with uncontrolled Generalized Tonic-Clonic seizures despite treatment with 1 or 2 anti-epileptic drugs.

Inclusion Criteria:

• An epilepsy patient with generalized tonic-clonic seizures that are classifiable according to the ILAE classification of epileptic seizures (Epilepsia, 1981)
• A patient on a stable dose of 1 or 2 anti-epileptic drugs for the last 4 weeks (potassium bromide and sodium bromide for the last 12 weeks) prior to and during the combined baseline period

Exclusion Criteria:

• Presence of any sign (clinical or imaging procedures) suggesting a progressive brain lesion/disease, in particular, progressive disorder with epileptic seizures
• Diagnosis of Lennox-Gastaut Syndrome
• Confirmed focal epilepsy based on clinical signs (seizure types), with consistent electroencephalogram and magnetic resonance imagining features
• A history of convulsive or non-convulsive status epilepticus while taking concomitant anti-epileptic drugs for the last 3 months prior to Visit 1