my dad has been diagnosed with dementia around 3 months back, we got to know this disease little late.earlier when I was visiting doctors, they were giving him antipsychotics which were not helpful so I went to a neurologist when my dad started eating small rocks (pica disease), he said that he has progressive dementia and gave aricept and other medicines, now the day we have started medicines, all the traits of dementia started coming out and now he can't walk and talk properly and can't pass his stool then I checked with the doctor and he increased the dosage (MG) of medicines, I am just skeptical about the side effects of medicines as he still have a good memory ( including past ones) apart from what he ate some time back, pls help me understand what kind or stage of dementia is this and suggest if i have to change the medicines or I can stop the medications after some point of time