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Zorluk: OrtaPharmacologic Interventions

A 7878-year-old woman is evaluated in the outpatient clinic for a 33-week history of increased confusion and two recent falls. She lives alone, and her daughter reports that the patient has been forgetting recent conversations and appearing unusually unsteady on her feet. Her past medical history includes hypertension, type 2 diabetes mellitus, overactive bladder, and insomnia. Her current daily medications are metformin, lisinopril, amlodipine, oxybutynin, and amitriptyline. Her blood pressure is 135/80135/80 mm Hg lying down and 110/65110/65 mm Hg standing. Her pulse is 8282/min lying down and 9696/min standing. Physical examination is notable for a dry oral mucosa and delayed cognitive recall. Laboratory results, including a comprehensive metabolic panel and urinalysis, are within normal limits. Which of the following are appropriate pharmacologic interventions for this patient? (Select all that apply)

  1. Taper and discontinue amitriptylineCevap
  2. Taper and discontinue oxybutyninCevap
  3. C
    Initiate doxazosin for blood pressure management
  4. D
    Substitute amitriptyline with diphenhydramine
  5. E
    Initiate donepezil for cognitive impairment

Cevap

The correct interventions are to taper and discontinue both amitriptyline and oxybutynin.
The correct interventions involve discontinuing medications that are inappropriate for older adults. This patient exhibits classic signs of anticholinergic toxicity, including dry mouth and cognitive impairment, along with orthostatic hypotension (a drop in systolic blood pressure of greater than 2020 mm Hg upon standing), which significantly increases her risk of falls. Amitriptyline (a tricyclic antidepressant) and oxybutynin (an antimuscarinic) both carry a heavy anticholinergic burden. According to the Beers criteria, these medications should be avoided in older adults. Removing these offending agents is the most appropriate initial step to reverse her cognitive impairment and reduce her fall risk.

Adım Adım Çözüm

1
Identify the patient's primary clinical problem.
The patient presents with acute-on-chronic confusion, falls, orthostatic hypotension, and dry mouth.
Establishing the clinical syndrome is essential for pinpointing the underlying etiology.
2
Review the patient's medication list for potential causes.
Amitriptyline and oxybutynin are identified as medications with potent anticholinergic side effects.
Polypharmacy and anticholinergic burden are leading causes of reversible delirium and falls in older adults.
3
Determine the most appropriate pharmacologic intervention.
The best action is to deprescribe the offending agents (amitriptyline and oxybutynin).
Removing the underlying cause of the anticholinergic toxicity is the definitive treatment before considering other diagnoses like dementia.

Anahtar Kavram

Medication reconciliation and reduction of anticholinergic burden in older adults
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