My ex father in law, now my friend, has been told by his wife that he has Alzheimers. She is a nurse. He has seen a general practioner and been prescribed RX. He has contacted me telling me that he is afraid of her. She isolates him by not allowing him to drive. They can never "make it" when we ask them to join us for outings. He states that she berates him, belittles him. He says that he has asked to see another doctor for a second opinion but she tells him that she knows what is going on and threatens to put him in a home. Cleary he has some memory problems, that may or may not be early stages, he is 62 y.o. but he is nowhere near incapacitated. He says there was a test three years ago but the results were discussed with his wife. She also handles all the discussions in private with the general practioner. He is not being treated by a neurologist. He does not want her to find out that he is asking me for help in getting him another doctor. Could this be some form of paranoia symptom or could there be something more sinister going on. He doesnt seem paranoid about anything or anyone else. If he wants to keep it a secret how should I handle it. He has called everyday asking me for help and that he is scared.

Christine, I'm sorry you have a need to be here, but glad you found us. Being only a friend (who is very concerned) makes things difficult for you. Your best option would be to contact your local Alzheimer's Association and explain your concern to them and ask them what you can and should do.
Yes, paranoia is a very real and terrible part of this disease, but it sounds like there is more involved here. Do contact the AA and see what options they're able to offer.
Best of luck in a very painful situation.

Sam