> I've been taking dilantin for the past five months at 500mg/day and over the
> past two was getting seizures minutes after going to bed or waking up as
> well as during any form of extended aerobic exercise.  A week ago I started
> taking 1000mg of Keppra on top of the dilantin and haven't had one seizure
> since even after moderate aerobic exercise.  Anyone else had success with
> this drug and know whether you build a tolerance to it over time?