Very worried about 84 year-old dad. He frequently goes into nocturnal sleeping cycles, has memory issues and often cannot remember the names of things. His expression has changed into a slackened, yet childlike wide-eyed sort of look. He is also forgetting to eat and drink and, when asked, says that he is hungry or thirsty but never communicates this unless prompted and won't (can't?) get for himself. HUGE shaking of hands, which he hides but can't always, especially now. He seems to be going downhill so fast. His PCP and oncologist do not seem worried because of his blood/other physical test results. He tries to get into cars that do not belong to us. He is such a shell of who he once was. It got worse about two/three months ago and is just so much worse now than before. Can anyone empathize with me based on their own experience, or offer advice on how to proceed as his advocate? He moans and complains of hot flashes, is up all night with almost manic energy, then feeling at death's door for long periods afterward. I can't bear seeing him like this.