Typically for a Breakthrough seizure like in your case, ( previously on Levetiracetam), We start with same old drug - Levetiracetam with slightly higher dose than normal.
U can start it at Levetiracetam 500mg and tapper gradually over 2 years.
But, you need to start after proper evaluation of history by a qualified Neurosurgeon/ neurologist
Next Steps
You can contact me via practo
Health Tips
Avoid Driving
Should adhere to Anti epileptic medication gor prescribed time period