Mom is 86 with vascular dementia. She stays up all night talking with people who aren't there. She holds actual conversations with them, sometimes calling out to me to come and help. I have tried playing along by "running them out of her room" and negating what she thinks she sees as well. I don't really know what to next. She is already taking antipsychotics. I have tried light therapy, which seemed to work at first, but no longer. She is confused as to time/space, we moved in with her because we thought it would be easier for her than taking her to a different home. She continuously asks the same questions about deceased relatives. She is one of 17 children, only one other survivor, whom we do not hear from. It gets old, but I can handle it during the day. Any suggestions for helping her sleep better? Melatonin works occasionally, but not always.