The Older Adult on Multiple Medications Who Becomes Confused
An 81-year-old woman with hypertension, type 2 diabetes, and osteoarthritis is admitted for a urinary tract infection. Her home medications are lisinopril 20 mg daily, metformin 1 g twice daily, ibuprofen 400 mg three times daily, and zolpidem 5 mg at bedtime. On admission she was alert and oriented to person, place, and time. On day 2 she is drowsy, oriented to person only, has not passed urine in 10 hours, and her blood pressure is 92/58 (home baseline 140/80). Creatinine has risen from 1.0 to 1.9 mg/dL. She has been receiving IV ceftriaxone and has had two doses of oxycodone for hip pain. The night nurse gave zolpidem at 22:00 because she 'wasn't sleeping.'
1. List the contributing factors to her acute confusion and rank them by how urgently they must be addressed.
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Contributors (ranked):
- Hypotension + rising creatinine + no urine for 10 hours - possible acute kidney injury and hypoperfusion. This is the most urgent; it can be life-threatening and is potentially reversible.
- Urinary retention - 10 hours without voiding in a confused older adult is retention until proven otherwise; a full bladder also worsens confusion and can drive infection.
- Medication burden - ibuprofen (nephrotoxic, especially with lisinopril and dehydration - a 'triple whammy' risk), metformin (should be held with AKI due to lactic acidosis risk), oxycodone (sedation, retention), and zolpidem (delirium trigger in older adults).
- Infection itself - UTI is a classic delirium precipitant.
Ranking rationale: Airway/breathing/circulation and renal perfusion come first, then bladder decompression, then medication review. Delirium is a symptom here, not a primary diagnosis - treating it as 'just confusion' misses the physiology.
2. What are your immediate nursing actions, and what will you communicate to the prescriber?
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Immediate actions:
- Full set of vitals, including orthostatic BP and a manual recheck; assess perfusion and mental status formally (e.g., CAM).
- Bladder scan; if retained, prepare for catheterization per order and monitor output.
- Start or maintain IV fluids as ordered; monitor strict intake/output hourly.
- Hold the next doses of ibuprofen, metformin, and zolpidem pending review - these are the highest-risk agents in this picture - and document the rationale.
- Fall precautions, bed low, call bell in reach, orienting communication, and involve family for baseline cognition.
Communicate to the prescriber (SBAR):
- Situation: New confusion, hypotension, oliguria, creatinine 1.0 → 1.9.
- Background: Home meds including ibuprofen, lisinopril, metformin, zolpidem; recent oxycodone; admitted for UTI.
- Assessment: Suspect AKI with possible retention and drug-related delirium; NSAID + ACE inhibitor + volume depletion is the likely driver.
- Recommendation: Review and hold nephrotoxic/sedating meds, consider renal dosing, order bladder scan/catheter, and recheck creatinine and electrolytes.
The exam point: recognize delirium as a medical emergency with a cause, not a behavior to sedate.