I have one daughter (17 years old) and a son (13 years old) both of them have seizeres only after three years of their age. Now my daughter is on zeptol 300 mg (1-0-1), lacoset 100 mg (1-0-1) and zonisep 100mg (0-0-1). my son is on zeptol 300 (1-0-1) encorate cron 300mg(1-0-1). daughter memory and IQ is poor and son develops autistic behavior and he cont speak. for both of them seizere is not controlled. MRI and other scans were normal. what is the cause for this seizere? and is the disorder is due to the long term medication please advise for the further action