High testosterone levels may increase the risk for aggression, hallucinations and other acting-out behaviors in men with Alzheimer's. (2014)
From the article:
Studies have found that having lower testosterone levels increased the risk for developing Alzheimer’s disease, said Dr. James Hall, Professor of Psychiatry and Behavioral Health.
“But once someone already has Alzheimer’s, higher levels of testosterone are related to acting-out behaviors,” he said. “Those behaviors, such as agitation and delusions, occur at some point in at least 70 percent of Alzheimer’s patients.”
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For the study, 87 elderly men with mild to moderate Alzheimer’s disease were evaluated. Dr. Hall found the likelihood of having hallucinations was 5.5 times greater for the men with higher levels of testosterone than those with lower levels.