Hi my sister was diagnosed with 'short term memory loss' 3 years ago. She has had 2brain scans and the latest shows there is some loss of cognitive function, a slight shrinkage in the cerebellum, but not enough to diagnose dementia or for her doctor to prescribe donepezil. She, her children and myself recognize her symptoms are getting worse and want to know if it's possible to buy the medication privately, and if it's a good idea?