Post neurosurgery was put on Phenytoin Sod Ex 100mg cap 3xnight. Have been on this medication for 3 1/2yrs as an Anit-Seizure preventative treatment. I have NEVER had a seizure. After a strong EEG I'm finally being slowly taken off of the medication. Told to decrease by 100mg for 1 week than another 100mg the 2nd week ... unitl done. My concern is are there any possible Side Effects by decreasing this medication?