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Look for a neurologist or geriatric psychatrist for guidance. There are several ways to go at this, but make sure he has a good physical to rule out other issues, including medication side effects. The specialist will likely ask for a PET scan, take a family history and a personal history of your dad from the family perspective, plus administer other tests. Then, if medication is not offered or you still aren't happy with your guidance, change doctors. But likely, the doctor will start him on some medications that slow the decline.   Some general doctors handle Alzheimer's, but it's usually best to see a specialist in aging (geriatrics) or a someone who deals with brain diseases - or both.   Carol