Inclusion Criteria:

• Diagnosis of epilepsy (all types of seizures) was made during the past year.
• Subjects must have had at least two unprovoked seizures in the past 2 years with at least one during the last 6 months.
• Female subjects without childbearing potential are eligible. Female subjects with childbearing potential are eligible if they use a medically accepted contraceptive method.

Exclusion Criteria:

• Subjects previously allocated to a trial treatment (CBZ, VPA and LEV) used in this trial.
• Participation in another clinical trial with an investigational drug or device within 12 weeks of the selection visit (V1), or at any time during this trial.
• Pregnant or lactating women.
• Presence of known pseudoseizures within the last year.
• Uncountable seizures (clusters) or history of convulsive status epilepticus.
• Any disorder or condition that may interfere with the absorption, distribution, metabolisation or excretion of drugs.
• History of suicide attempt, current suicidal ideation, or other serious psychiatric disorders requiring or having required hospitalization or medication within the previous five years.
• Presence of progressive cerebral disease, any other progressively degenerative neurological disease, or any cerebral tumors.
• Presence of a terminal illness or any medical condition that might interfere with the subject's trial participation.