Why Do Doctors Prescribe Aricept Whose Side Effects Causes The

Why do doctors prescribe aricept whose side effects causes the same problems it is treating? My sister is suffering from "dementia" and has had memory, speech and cognitive problems since 2011, following a job change,the end of her 30 year marriage, moving from the country to town as well as her last child moving out. No higher education, self employed with said husband for approximately 25 of those years? I truely don't believe it is dementia so I don't believe the aricept is beneficial. The newest diagnosis is interior carotid occlusion. She has displayed spatial neglect of her left side for years. I can't get a pulse or blood pressure reading on the left side and I question if she isn't suffering some seizure activity. She was initially diagnosed with Alzheimer's, then maybe frontal temporal lobe disorder ( something like that), then ocular basilar ganglion and now vascular dementia. The later three in the last 12 months