A client who takes simvastatin is prescribed a 5-day course of nirmatrelvir with ritonavir. Which action should the nurse take?
1Administer simvastatin throughout the 5-day antiviral course and monitor only the client temperature for evidence of interaction.
2Hold simvastatin under the authorized plan from at least 12 hours before PAXLOVID until 5 days after the 5-day course ends.✓ Correct answer
3Double the simvastatin dose while ritonavir is used because the antiviral lowers statin exposure and muscle-toxicity risk.
4Cancel the antiviral regimen permanently and continue simvastatin without asking the prescriber or pharmacist about interaction management.
Explanation
Ritonavir markedly increases simvastatin exposure and myopathy or rhabdomyolysis risk. The current FDA label permits the antiviral regimen when simvastatin is temporarily discontinued for the specified interval.
Quick answer Prevent a dangerous interaction by holding simvastatin across the antiviral window.
Why this is correct The FDA label states that coadministration is contraindicated and specifies stopping simvastatin at least 12 hours before treatment, during all 5 days, and for 5 days afterward when PAXLOVID is medically necessary.
Easy analogy or mental picture Ritonavir closes the statin exit lane, so pause the statin until the traffic clears.
Memory hook Simvastatin: 12 hours before, 5 days during, 5 days after.
NCLEX decision rule Perform a complete interaction review because ritonavir affects many prescription, nonprescription, and herbal products.
Why the other choices are wrong Coadministration and dose escalation increase toxicity; abandoning indicated antiviral treatment without an interaction plan is also inappropriate.
Ritonavir interaction screenReconcile all medications, verify renal function and antiviral dose, document hold and restart dates, and teach muscle-toxicity warning symptoms.