The elderly do not clear meds easily and perhaps the doses are high for her
weight?
Is she taking anything else, say something for the stomach?
Like Tagamet or Pepcid? H2 antagonists can cause hallucinations in the
elderly (they are thought to cross the blood brain barrier in this group).
You might be focusing on the 3 newest drugs and ignoring the contribution
of a seemingly innocent drug-- and these are now over the counter...and can interact with other medications.
Nortriptyline can cause anticholinergic side effects in the elderly depending on dose. Many effects of anticholinergic actions can cause mental confusion or
frank delirium (belladonna alkaloids to do this too). It has to do with blocking
certain receptors in the brain. I would consider this possibility. Doctors give this drug for "nerve" pain. I would suggest the lowest dose to start, 10mg.
http://ajp.psychiatryonline.org/cgi/...ull/155/8/1110
Many people find fentanyl easier to tolerate for pain than other opiates. But if the dose is too high, then it can cause central nervous system effects too.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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