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Zorluk: ZorMedical History Evaluation

A 71-year-old man is brought to the emergency department with a 3-day history of worsening shortness of breath, orthopnea, and palpitations. His past medical history is significant for heart failure with reduced ejection fraction, atrial fibrillation, and osteoarthritis. His maintenance medications include sacubitril-valsartan, carvedilol, apixaban, digoxin, and furosemide. He reports that 10 days ago, he developed a 'head cold' and a severe flare of his knee pain, for which he sought care at an urgent care clinic and purchased several over-the-counter products. During the medical history evaluation, the physician must identify any recent pharmacologic additions. Which of the following agents, if uncovered during the medication history, possess a direct pathophysiologic mechanism or drug-drug interaction that explains his acute clinical deterioration? (Select all that apply)

  1. Over-the-counter naproxenCevap
  2. Over-the-counter pseudoephedrineCevap
  3. A short course of clarithromycinCevap
  4. D
    Over-the-counter acetaminophen
  5. E
    A short course of amoxicillin

Cevap

The correct elements to identify in the history are over-the-counter naproxen, over-the-counter pseudoephedrine, and a short course of clarithromycin.
The correct options represent agents that have a direct pathophysiologic link to the patient's acute decompensation. Naproxen impairs renal perfusion and diuretic efficacy, causing volume overload. Pseudoephedrine drives sympathetic tone, worsening cardiac workload and triggering arrhythmias. Clarithromycin inhibits P-glycoprotein, leading to digoxin toxicity and subsequent arrhythmias.

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1
Analyze the patient's presentation and baseline vulnerabilities.
The patient is experiencing an acute decompensation of heart failure with reduced ejection fraction, presenting with volume overload (shortness of breath, orthopnea) and arrhythmias (palpitations), superimposed on a complex medication regimen including digoxin.
Identifying the primary pathophysiologic derangements guides the search for specific triggers in the recent history.
2
Evaluate the mechanism of potential over-the-counter options for osteoarthritis and upper respiratory symptoms.
Naproxen (NSAID) causes renal sodium/water retention and antagonizes loop diuretics. Pseudoephedrine causes sympathetic stimulation, increasing afterload and heart rate.
OTC medications are frequent culprits for heart failure exacerbations.
3
Assess potential prescription antibiotics for pharmacokinetic drug interactions.
Clarithromycin inhibits P-glycoprotein, precipitating digoxin toxicity (explaining palpitations). Amoxicillin does not interact with the regimen.
Polypharmacy increases the risk of severe drug-drug interactions, particularly with narrow therapeutic index drugs like digoxin.

Anahtar Kavram

In patients with compensated heart failure, a detailed medical history must actively screen for recently added agents that exacerbate volume overload (NSAIDs), increase cardiac workload (sympathomimetics), or precipitate toxicity of baseline medications through drug-drug interactions (e.g., macrolide antibiotics inhibiting digoxin clearance).
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