Elderly patient with falls, polypharmacy, and confusion
An 81-year-old woman is brought by her daughter because of two falls in the past week and increasing confusion over 3 days. She lives alone and manages her own medications. Her list includes amlodipine 10 mg, furosemide 40 mg, lisinopril 20 mg, metformin 1 g twice daily, ibuprofen 400 mg three times daily for knee pain, and zopiclone 7.5 mg at night. On examination she is drowsy but oriented to person only, temperature 37.1°C, blood pressure 98/58 mmHg (lying) and 82/50 mmHg (standing), pulse 92/min irregular, respiratory rate 20/min, SpO2 95%. She has dry mucous membranes, reduced skin turgor, and bilateral basal crackles. Capillary glucose is 4.1 mmol/L.
1. What is your working diagnosis and which medication-related factors are contributing?
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Working diagnosis: Acute confusion (delirium) with falls, likely multifactorial, with volume depletion and postural hypotension as major contributors. Possible precipitant: dehydration and electrolyte disturbance from diuretics plus NSAID use, with possible early infection or renal impairment to exclude.
Medication-related contributors:
- Furosemide: volume depletion, postural hypotension, electrolyte loss (sodium, potassium, magnesium), and prerenal kidney injury.
- Lisinopril + furosemide + NSAID ('triple whammy'): increased risk of acute kidney injury and hyperkalemia.
- Amlodipine: contributes to hypotension, especially with volume depletion.
- Ibuprofen: worsens renal perfusion, fluid retention, and blood pressure; increases GI and renal risk in the elderly.
- Zopiclone: sedative-hypnotic; increases fall risk, confusion, and next-day drowsiness.
- Metformin: risk of lactic acidosis if renal function declines; needs review with renal function.
Assessment: Check renal function, electrolytes, full blood count, CRP, urinalysis, ECG (irregular pulse - assess for atrial fibrillation), and lying/standing blood pressure. Review for infection, constipation, pain, and environmental fall risks.
2. How would you manage her medications and disposition, balancing safety with avoiding harm from over-correction?
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Immediate management:
- Resuscitation: Cautious IV fluid replacement with isotonic crystalloid, guided by clinical response and renal function; avoid rapid over-correction in an elderly patient with possible cardiac disease.
- Medication changes:
- Withhold furosemide and ibuprofen temporarily.
- Review lisinopril and amlodipine in the context of hypotension; consider dose reduction or holding until hemodynamically stable.
- Stop zopiclone; use non-pharmacological sleep and delirium measures.
- Continue metformin only after renal function is confirmed acceptable.
- Delirium care: Reorientation, hydration, mobilization with assistance, sleep hygiene, treat pain, screen for infection, and involve family.
- Falls assessment: Lying/standing blood pressure, gait and balance assessment, vision, footwear, home hazards, and bone health review.
Disposition: Admit for observation and stabilization if she remains hypotensive or confused; do not simply send home. Arrange a medication review with her primary care physician and pharmacist, a falls prevention plan, and a follow-up appointment. Involve the daughter in medication management and consider a compliance aid. Document a clear, simplified medication list and explain changes to the patient and family.