A very close friends mother has gone from being active, able bodied, competent, and able to take care of herself, to a shell of that person in 7 months. She started getting lost on her way to her sisters house, somewhere she went every day for 40 years. Forgetting what type of things she would do or who she would do them with. Make little lies about things she did not know the answers to. Getting up in the middle of the night to vacuum, then do it all over again as soon as she put it away. If you asked her why, she would say because it needs vacuuming. She did not remember just doing it. She was taken to the Dr. who said it sounded like a B vitamin problem and ordered B12 shots every month. That did nothing and after 3 months of her only getting worse they changed Dr.s. Some tests were ordered, head CT, shows nothing, labs, nothing out of the ordinary, and some sort of memory testing that would take several hrs. (still has not been scheduled) Last week she got up in the middle of the night and took a shower, 6 times. They last time she did it she had her nightgown on and just got back into bed with it on wet. She sleeps all day and night and does nothing. The Dr. mentioned depression as well but this women went from being everything to nothing in 6 months time. She is 73. Any thoughts?