An inappropriately treated UTI can lead to mental status changes in the elderly. It seems like a variety of antibiotics have been tried. You can ask whether a culture and sensitivity test of the urine was positive. That can help narrow the choice of appropriate antibiotic. If there continues to be signs of an infection, a referral to an infectious disease specialist can be considered.
If the change in mental status continues despite appropriately treating the infection, a re-examination by a neurologist can be considered. Going through her list of medications should also be done as well.
These options can be discussed with her personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
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