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Adverse Effects/Contraindications/Interactions
For each foscarnet finding, identify the medication-safety interpretation. More than one column may apply.
Matrix
Choose your responses, then check the answer.
Explanation
Rising creatinine indicates declining clearance, low calcium and magnesium increase seizure risk, hydration supports renal protection, and new paresthesia or twitching requires immediate evaluation.
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In-depth explanation Clinical scenario
Quick answer Foscarnet safety depends on
kidney function, hydration, and mineral balance .
Why this is correct Renal impairment is a major foscarnet toxicity, and dose must be individualized to renal function. Ionized calcium, magnesium, potassium, and phosphate shifts can produce neuromuscular symptoms, dysrhythmias, or seizures.
Easy analogy or mental picture The kidney sets the dose lane while four electrolyte gauges protect the electrical system.
Memory hook Foscarnet: hydrate, renal-dose, and watch calcium, magnesium, potassium, phosphate. NCLEX decision rule Classify the finding by whether it changes exposure, neurologic risk, or renal protection.
Why the other choices are wrong A completed hydration order does not cancel a rising creatinine or symptomatic electrolyte abnormality.
References
1 DailyMed: Foscarnet Sodium InjectionHydration, individualized renal dosing, frequent creatinine and electrolyte monitoring, and seizure risk
Foscarnet monitoring Trend creatinine clearance, urine output, hydration, ionized calcium, magnesium, potassium, phosphate, ECG, paresthesia, twitching, and seizures.
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For study reference only. Always follow current clinical guidelines and your institution’s protocols.