Can Long Term Usage Of Oxetol Cause Any Problem?

Hellow Dr. my wife is 32 yr old. She is use oxetol 300 is last 6years 1 1/2 moening &1 1/2 night since 2005 jun in during after 2 yr reduse dose of 1 X1 6 months &1 at night 1 year continus during she has praganent 3 rd months pregency she is khech (epilepcy) may 2008 & dr start repet course 1 1/2 oxetol 300 morning &1 1/2 oxetol 300 night & this is running current days today what can i say this 3 years is she is normal ? i reduse dose after 17may2011