often linked with strokes, maggie, even wee ones.
My mother has both Alzheimers and Vascular Dementia.
Has your friend been registered yet with your local Mental Health Community unit as they are very supportive and not just with the medical side - things like what allowances are available, driving etc etc -
One of the things that she should do assuming reasonable cognisance is make sure she/he has signed a power of attorney across to family who will help support her. Sooner that is done the better as if it goes to far, it can be a butto of a process.