I have a sister that has spells, that seem as if she is drunk. she says she hasn t been drinking although its hard to believe. she stairs blankly sometimes, but most times she has slurred speech & has a hard time completing a thought. she also repeats herself over & over. It drives us crazy, yet I m very concerned for her well being. she gets weird facial expressions &squints a lot when this comes over her. its happening more often as time goes on. she knows something is wrong but doesn t realize how bad it is. she does drink often, but this thing comes on when we re pretty sure no alcohol is involved. what could be happening?