It was happened few times. He was sitting on the toilet sit for a long time, then he stood up very mad and talked like crazy, then started to fight with me. I tried to calm down him, he became even worse. I am scared now. I run away, came back in 15 minute , he was mad, not aggressive. He has Dementia for 4 years, he was very quiet, nice person before.
I'm betting this isn't unusual behavior for Alzheimer's patients. My sister-in-law attacked her husband a number of times. Th worst I personally witnessed was her coming up behind him with a pot and attempting to hit her over the head with it. THAT was when the family realized the seriousness of Dan's predicament.
Call his doctor today. Describe to him what happened and ask if there is medicine that can handle this unintentional but dangerous aggression. That's first up. Next, if you haven't already spoken to an elder law attorney, find one and make an appointment if you have any assets to protect. This so that you can plan for his placement in a nursing home.
You simply must act immediately. Until and unless something changes, you cannot trust your husband. The next time something like that happens might be at 3 AM in the morning when you're asleep.
Do call 911, not from home, from a safe place, a neighbor, perhaps. I would ask his doc to admit him for a geriatric psychiatric assessment. Those assessments are normally three days to try to regulate behavior by working with meds. Sometimes they can take longer than three days.
His Dr. needs to know about this because there might be a medication to calm this behavior. I wouldn't trust a medicine to enable you to keep him safely at home unless the Dr. can guarantee it will work...which is a huge guarantee that is questionable. This problem is due to the disease of dementia and isn't your husband's fault. Please don't keep yourself in harm's way. If your husband were well he would never want you to allow him to hurt you. Take care.
At the very least, talk to his doctor about the aggressive behavior. Whatever you do, don't put yourself in harm's way. Get to safety and call 911 if you are being threatened. It is the disease that is making him behave this way, but the things that he does can hurt you regardless of the reason. If they find the right medications, it will make life easier for both you and him. Please let us know what is happening with you.