hello from 6 months my grandfather was behieving abnormal. his age is about 85 years now, he is unable to remember the thing which happan in a day he is losing his mamory day by day, he is sitting alone, dont want to talk to any one in home ,not understanding what he is doing. getting vitual,audial hellioesanation and delusion ,not eating food, get getting angry on family members, no sleep whole nigth, please tell what should we do now