My Mum had a CT scan done back on 17th may this year when the results came through (early part of June) it showed that her brain had shrunk and was diagnosed with AD. In early June one day she flipped, she became hateful and aggressive towards me and i got to the point that i could not cope anymore and she was admitted to a dementia assessment unit which she is still there. After 2 weeks of her going in she was put on Aricept as we were told she was at the mild to moderate stage of the illness. We have recently found out a week after the event that she is no longer on the aricept because her illness has now progressed to moderate to severe and they are now saying that she has Vascular dementia as well as AD. Aricept i have been told takes a minimum of 3 months to show any signs of improvement of which Mum was not given that 3 month stint. With the recent rapid decline the doctor will not carry out anymore test i.e another CT scan to confirm if she now has a mixed dementia, are we entitled to a 2nd opinion and if so how do we go about it?