How Long Should Oxetol Be Taken For Epilepsy?

Dear Sir(Neurologist), I m 29 years old suffering from Epilepsy working as SoftwareProfessional i m facing big trouble with OXETOL MEDICINE. please suggest me permanent solution for my disorder and Medicine. History: 1st seizure 18 years and repeated seizures for around 6 to 7 times during 2 years and Started Eptoin(phenotin) and continued for 3 years as per doctors advice and stopped(I didn t consulted doctor for stoppage but stopped).after 6 to 7 years had severe 1st during Brush time went to unconscious for 15 to mins and 2nd time it s very severe tongue bitten with full of blood from mouth etc, this day is very bad day for me. Then i approached after all the tests(EEG/CT/MRI) suggested again phenotin. after on month due to some alcohilic smell and uncontrollability during walk some problem i faced. then doctor suggested to take for 3 years OXETOL(Oxcarbazepine).I cintinud same for 3 years(seizure free) but i faced some kinds of side effects like confusion sleepy slurred speech if said Dr these are common he replied. after completing 3 years course i asked dr to stop medicine. then he recommended for EEG. after analyzing the eeg Dr suggesteed to take for 2 years at least i continued for 2 years again approached same Dr. took EEG againt he is suggesting to continue with same now i m using oxetol. my question is till how many years i have to continue same medicine. i m facing lot of problems due to this medicine. right now i m software professional. i m having understanding problem. work execution and talking and also i am taking more time as per Manager review. Please help me in this regard.