Our expert says:
Wondering, it's impossible to be certain, at this distance, but the caffeine in coffee does make some people more anxious and irritable, even more aggressive. I suppose it might be difficult to persuade her to cut down on her coffee intake --- though one might persuade her to try a nice decaffeinated variety, and see if it makes a difference. In older people with Dementia who get aggressive, some medications can help to calm them without making them sleepy --- one needs NOT the usual benzo's ( the valium / ativan family, which can actually increase aggression in some people ) but rather some of the meds usually used to treat schizophrenia and other psychotic illnesses, which are calming without being so sedative.
Some people wih dementia have a brain that can act similarly to that of a child, where they may be relatively sedated by a stimulant like coffee ( like a kid with ADHD takes ritalin ) and may be agitated by sedatives.
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