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@woodpony
What you describe is quite common although I haven’t experienced it myself I know other members have. In the evening it could be due to sundowning. As she’s just started to take new medication I would go and talk to her doctor and see if this might be part of the problem. Another possibility is an infection so again see her doctor.
Is she still as confused this morning? Sundowning tends to happen in the late afternoon to evening when confusion increases as the PWD gets tired.
It sometimes helps to pretend that you will be back soon. Some find that leaving the room and announcing themselves by name when they come back in helps the person the recognise them.
This link may give you some more ideas on how to cope.
Thank you for responding to my post the link was a great help.