On Epilim 500 To Control Epilepsy. I Have Reduced The Dosage And Missing Pills. Should I Continue The Medicine?

I have been taking Epilim 500 for 14 years, 2 tabs each morning & 2 tabs each night to control Epilepsy . I have been seizure free since December 2000. On the first of January this year I decided to reduce my Epilim intake by 50%, I have only taken it in the morning this year, I often forget to take it and go several days without taking it. Do you think I still need it? Am I being irresponsible by not taking it?