This is Dr. David
I am sorry about your husband's father's dementia
his heavy drinking can definitely cause mental decline and poor blood vessels and can cause dementia as well.
without knowing his medical course and knowing over the years, it can be very difficult to know when his dementia started.
his dementia could have started a few months or a few years ago possibly.
was he married? did his wife pass away already. if she were alive, she may know when he started to have more confusion of his thinking as a sign of dementia.
let me know if you have other questions.
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