I have been takiing levetiracetam tab 500m ER tablet, 2at bedtme, its expensive, $141.00 for 3 month supply with insurance. I aked my Neuro doctor today about a 500MG regular tablet, with I think the script is for Keppra 500mg. I have nocturnil seizurs sometimes, non for last 3 months. Is this going to be a problem now with this generic medicine which is only $26 for 3 month. Im confused.Jan