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Does he have other signs of cognitive decline or other symptoms of dementia while awake?
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"Dementia is only one possible explanation.

Possible Causes...

1. REM Sleep Behavior Disorder (RBD)

People physically act out vivid dreams (kicking, punching, talking).
Common in some Parkinson’s-related disorders and Lewy body dementia.
Can also occur without dementia.

2. Lewy Body Dementia

Vivid, detailed dreams and dream-like hallucinations are common early symptoms.
Often accompanied by changes in alertness, movement issues, or fluctuations in thinking.

3. Other Dementias

Alzheimer’s and frontotemporal dementia can cause confusion between dreams and reality, but it usually appears in later stages.

In early dementia, it’s more common to have daytime confusion rather than purely dream-related confusion.

4. Medication Side Effects

Some drugs — especially sleep aids, antidepressants, Parkinson’s medications, or even certain blood pressure meds — can cause vivid dreams and morning confusion.

5. Sleep Disturbances & Other Causes

Sleep apnea, poor sleep quality, or high stress can make dreams more vivid and leave the brain in a fog upon waking.

Infections (like a urinary tract infection in older adults) can cause short-term confusion that may mix dream and reality.

When to Be Concerned...

See a doctor if:

The confusion about dreams happens often and lasts well after waking.
There are memory changes, difficulty with problem-solving, or disorientation during the day.

There are hallucinations (seeing or hearing things while awake).
You notice changes in walking, balance, or facial expression along with dream confusion."

Source: ChatGPT
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According to "Google" "experiencing persistent confusion between dreams and reality, know as oneirophrenia, can be a symptom associated with dementia. This symptom is more commonly seen in Lewy Body dementia, where it can be accompanied by REM sleep behavior disorder(acting out in dreams).
However it can also occur in other types of dementia and even with organic brain damage."
But..."It's crucial to understand that experiencing oneirophrenia alone does not definitively indicate dementia. However, it's a symptom that, when coupled with other potential signs of cognitive decline, warrants further investigation by a medical professional."
And other causes of oneirophrenia can be delirium, certain medications or other neurological conditions, so if you're concerned about this, please have your husband checked out by his doctor.
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These may not be dreams but night hallucinations. It, other than his poor balance, was the first sign of my brother's Lewy's Dementia. He was awake at the time he had these "vivid dreams" and they often occurred when he had been up to the bathroom and was returning to bed. He would describe completely vivid and well remembered hallucinations: a garden party outside around his pool (he had no pool) in which he could describe in great detail every person. An immigrant woman in brown monk-like robes, huddling in his corner trying to protect her baby, and etc.
I would watch for other problems such as gait changes, poor balance, decreased swallow, confusion in executive functioning (paying bills, addressing things), poor driving decisions, etc. My brother's Lewy's was diagnosed by his symptoms as "probable early Lewy's Dementia. He was dead within a year and one half, and it did not appreciably increase in that time. There were some vision changes as to perspective of how far away or how close things were, etc. He was a wonder at describing "his new world" and how he saw it.

I wish you luck. This is no diagnosis. But it is something to watch closely. Perhaps discuss with doc at next checkup.
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Mlatimer46: Seek a neurologist.
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My husband had very vivid dreams that he said would continue while he was awake (using the bathroom at night) he could go back to sleep and continue the dream. One evening he woke me up and said he was seeing vapor trails out of the sides of his eyes. Flowing lines of colors. That was enough for me to take him to the ER. MRI showed the beginning of Frontal Temporal Dementia. That was five years ago.
Talk to his doctor about your concerns. Neurologist appointment is a very good idea. It might take months to see one.
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I had and would have continued to have VERY BAD dream all my life. The dreams would continued even after I woke up and often all through the day. I am not saying that isn't dementia...just that it was a problem for me, I do not have dementia. But, a med called Mini already of prozocin. It has changed my life! I won't bring that up to the doctor too.
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lealonnie1 Aug 17, 2025
To clarify......

Prazosin, originally developed to treat high blood pressure, has been shown to be effective in reducing nightmares associated with post-traumatic stress disorder (PTSD). It works by blocking alpha-1 adrenergic receptors in the brain, which helps reduce excessive norepinephrine activity associated with trauma-related nightmares. 
How it's used
Prazosin is typically prescribed off-label for PTSD-associated nightmares.
Treatment is individualized.
Effectiveness can be seen within days to weeks, with patients reporting fewer and less intense nightmares, and improved sleep quality. 
Potential benefits
Reduced frequency and intensity of nightmares.
Improved sleep quality.
Doesn't cause sedation or addiction, unlike traditional sleep medications. 
Side effects
Common side effects include dizziness, headaches, drowsiness, weakness, and low blood pressure.
Rarely, prazosin might worsen nightmares or insomnia in some individuals, particularly in complex cases or with pre-existing psychiatric conditions.
Patients should be advised to take the initial administration at bedtime while lying down and rise slowly to minimize the risk of dizziness. 
Important considerations
Although studies have shown positive results, the evidence base is relatively small, with ongoing research continuing to refine the understanding of prazosin's efficacy.
The effectiveness may vary among individuals, and some may not experience significant relief from nightmares with prazosin.
It's crucial to discuss the risks and benefits with a healthcare professional to determine if prazosin is an appropriate treatment option.
Alternatives to prazosin for treating nightmares include other medications like trazodone, clonidine, and atypical antipsychotics, as well as therapies like trauma-focused psychotherapy.
Combining medication with trauma-focused psychotherapy often provides better results than either approach alone. 
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Hello - my dad was having these horrible dreams, he would call me at 4 am - he lives with me - telling me to come get him, asking where I was, seeing people who weren't listening to him and this would cause him distress - nurses would say have him tested for a UTI - which we had done but always no infection. Then I couldn't wake him one day and the nurse told me to take him to the hospital, and it turned out he had a terrible blood infection, he was on 5 days of IV antibiotics and 48 days of oral antibiotics, once the infection was contained, the dreams, the seeing people, the phone calls at 4 am stopped. I would suggest speaking to his doctor and making sure there isn't an infection anywhere, not just a UTI - infections present differently in older people.
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Geaton777 Aug 18, 2025
This is an excellent piece of advice. My very elderly Aunt woke up with "flipped vision" -- which can be a neurological symptom of sepsis. It turns out she had an untreated cat bite on a part of her leg that no one knew about. She did not have any cognitive impairment. She spent a week in the hospital on antibiotics and it cleared up.
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Wild dreams could occur after a spicy meal or new medication! You find out if a person has dementia by taking them to a neurologist, who runs tests and orders an MRI.
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