I had been on Dilantin since I was 13 ( am now 38) switched to Keppra in August, had a breakthrough seizure, first one in 18yrs, 2 weekends ago. Any way I had my Dilantin level checked and just heard back from my Neurologist and they said it is at 17...they like it to be between 10-20. Does that sound normal? I take 300mg/day at bedtime. My precious D. said they like it between 8 & 12....is it because I just started taking it again?