Study to Look at How Effective Briviact is as add-on Treatment for Patients With Epilepsy With Partial Onset Seizures

Inclusion Criteria: * Patient has never been treated with brivaracetam (BRV) prior to enrollment in this Non-Interventional Study (NIS) * The decision by the treating physician to prescribe BRV is made independently of the participation in the NIS * Patient is a male or female ≥16 years of age * Patient has a clinical diagnosis of epilepsy with partial-onset seizures POS with or without secondary generalization * Patient uses an epilepsy/seizure diary. Exclusion Criteria: No specific exclusion criteria