Wow. He has been diagnosed for a long time and is still running around like regular! It sounds like my father-in-law who is tall and weights 146 lb. My FIL is also MD PhD although he cannot practice in the USA (MD from Europe.)
These elders who are highly educated do progess slower than other patients and are more proud to admit something is wrong. Does he admit he has something wrong with his brain? At times, my FIL would say his brain is screwed up. He has 24 hours home care and needs help to take a shower and needs to be told to wash his hands. He can still go shopping with the caregiver and he no longer drives or goes to the bank.
Driving is tricky. You can ask the family doctor to refer him to a test center where the neurologist or psychiatrist can do some test on his memory in the office asking him questions for 3 hours. Then the doctor can tell you if he has Alzheimer's or not. And they will say he cannot drive. That is what happened to my FIL and how he was diagnosed.
Since your husband is diagnosed with AD, the DMV is Not supposed to give him his license unless you didn't tell the DMV that when he renewed his license. Just go throug the DMV procedure and he won't have the license.
The next hard thing is to prevent him from driving. Take away the key or sell his car/donate his car... My FIL at times still says he need to drive but we told him the caregiver will drive him.
Your husband needs to take AD drugs. Since he was diagnosed, he needs to take aricept, or namenda and exelon unless he gets side effects. My FIL took them for 1 year and half until he had too much confusion in Sept. 2008. He is 88.
I think you need to take care of the driving thing first and then ask the doctor for AD drugs and those drugs can help him to calm down and be perceptive. However, the AD drugs are not for anxiety, so he may need the drugs for anxiety to control his mood.
If he could attack you, you may need to protect yourself also.
These things are easy to be said than done.
Good luck,
Nina