Determine Effects of Adjunctive Levetiracetam on Sleep Architecture in Adults With Partial Onset Epilepsy.

9-11 Week Multicenter, Randomized, Double-blind, Placebo-controlled, Parallel Study to Determine Effects of Adjunctive Levetiracetam on Sleep Architecture of Adults With Partial Onset Epilepsy Receiving a First Generation Anti-epileptic Drug.

Effect of adjunctive levetiracetam on polysomnography in adults with partial-onset epilepsy receiving a classical antiepileptic drug

Inclusion Criteria:

• Subjects must have partial onset epilepsy and have been taking carbamazepine or phenytoin at a stable dose for a period of 4 weeks prior to the selection visit
• Subjects must have controlled partial onset seizures which can potentially benefit from adjunctive treatment

Exclusion Criteria:

• Subjects dosing with LEV two weeks prior to the selection visit
• Subjects using more than one AED
• Subjects with specific and non-specific sleep disorders