My mom had a cat scan, ( normal), blood work, (normal), urinalysis ( normal). She is not normal however, verbally abusive to my dad, accuses him cheating, poisoning her, moving things, etc. He tries overlook it. I want to get help, but does dad have to make the call? They live at their own home & are 76. She also thinks house is bugged & people follow them.
"ok" with this you should back off from working on mom and going on about what's wrong with her. Try to get dad away once in a while for some relief. Let it go. If he wants help, make a plan with him, then carry it out.
You need to get dad to see that there is help for her and it's not a loony bin or sedatives. He needs to get himself educated so he can help her.
If something like that won't work, can you investigate an involuntary psychiatric evaluation? You might go with your father to visit a geriatric to describe mom's symptoms. Dad probably needs antidepressants at this point, and it would probably do him good to get a professional opinion on HIS ability to cope with this ongoing abuse.
With a demented mom and a passive dad, it sounds as though you're going to have to be the grownup here!
Your mom has dementia. Her brain is broken (alternatively, she's got some kind of mental illness that is causing paranoia). You are not going to convict her of anything; she is apparently past the reasoning stage.
If your dad is her full time caregiver, HE'S the one to worry about, and to work on. One third of all caregivers die before the person they are caring for does. This is especially true of older spouses. He needs to see that the best way he can express his love right now is by getting her to a new doctor; whether it's a geriatrician, a neurologist who specializes in dementia or a geriatric psychiatrist, any of them will have better ideas than her GP. Just make sure you or dad slips the doctor a list of symptoms beforehand.
In any event, make dad the focus of the intervention, especially as regards the psychiatrist. It might make her want to go.
Also are you certain she's taking her current meds properly?
the thing about her doctor? I'd call up her doctor and discuss this with him/her. Perhaps they are concerned about losing an alliance with her, or about losing her as a patient, or that her doctor simply is out of his depth here. S/he's not a geriatric doc, right? That's what she needs. And you need to be able to say to her, "no mom, you're not staying at my house again until we get this checked out. I just don't feel safe with you in this unstable mental state. I'm your child. I want what's best for you"
First, let me say "don't call APS" - they will only make things worse, secondly, if I may, don't tell her she needs help as that will only make her more agitated. See if you can get some help from another doctor. Has she always had the tendency to be aggressive? If not, diseases like Dementia, Alzheimer's, and others can sometimes change a person's personality. I don't think a psych doctor is the answer either. Maybe like cameo2014 suggested, some meds to calm her a little. It would also help to get them away from each other for small breaks - like dinner, movies, shopping, etc. - if that's possible. Also, you need to take care of yourself and give yourself a break because it wouldn't be good if you got run down or sick because then you wouldn't be able to do all you need to do for them. So sorry you are having to deal with all of this, but it will get better eventually. Good luck and God bless all involved.