A consultant pharmacist is performing a monthly Medication Regimen Review (MRR) for an 82-year-old resident of a long-term care facility. The resident was recently treated for a UTI and now complains of new-onset dizziness and confusion. The pharmacist notes a new prescription for oxybutynin for urinary incontinence. Which of the following medication-related problems is the MOST likely cause of the resident's new symptoms?
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A
Drug use without indication
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B
Prescribing cascade
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C
Subtherapeutic dosage
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D
Untreated condition