Seizures occurring in clusters

Status epilepticus within 3 months of Visit 1

History of non-epileptic seizures

Known allergic reaction or intolerance to pyrrolidine derivatives and/or excipients

Pregnant or lactating women. Any woman with childbearing potential who is not using a medically accepted, non-hormonal method of birth control

A Study to Look at the Efficacy and Safety of Keppra® Extended Release Formulation - XR