This has happened very very suddenly.
Dad has had Alzheimers for about 15 years. Last week he vomited for a day. It seems to have really flattened him. He did not speak much and when he did nothing made sense - but now he does not at all. He doesn't even get agitated and grumpy as he used to late in the afternoon. He is very tired and hardly stays awake to be fed. He shows absolutely no interest in food, no matter how tempting, and when feeding him it seems like he is battling to swallow and does not seem to understand the instruction. I have stroked his chin to assist - with limited success. Should I be taking him to a doctor or is it possible to regress so fast suddenly? Don't know if a doctor would help because he not able to communicate what wrong. Any advice?