A 65-year-old client is being instructed about rivaroxaban 2… | MyMerci
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Question
A 65-year-old client is being instructed about rivaroxaban 20 mg orally once daily for stroke prevention in atrial fibrillation. Which administration instruction is most important?
1Take the 20 mg dose with the largest meal of the day (typically dinner) at the same time each day to ensure adequate bioavailability and consistent drug levels.✓ Correct answer
2If the tablet is difficult to swallow whole, you may crush it and mix it with a small amount of applesauce or apple juice to help with administration.
3If you forget a dose, omit it and take the next dose at the usual time; taking a missed dose later could lead to an increased risk of bleeding complications.
4Take rivaroxaban on an empty stomach, at least 1 hour before or 2 hours after meals, to maximize absorption and achieve predictable anticoagulant effects.
Explanation
Rivaroxaban administration — food matters at 15 / 20 mg Rivaroxaban is a direct factor Xa inhibitor. Bioavailability differs by dose: • 10 mg: ~80–100% bioavailability — can be taken with or without food. • 15 mg and 20 mg: bioavailability drops to ~66% on an empty stomach but reaches ~100% when taken WITH food. Patients on 15 / 20 mg must take with the largest meal of the day to ensure therapeutic levels and avoid stroke breakthrough. • Take at approximately the same time daily to maintain steady plasma levels.
Other key teaching: • Missed dose: if a once-daily dose is missed, take it as soon as remembered on the same day; if not, skip and take next day at usual time. For twice-daily dosing (DVT/PE treatment 15 mg BID), if a dose is missed, take it as soon as remembered to ensure 30 mg total per day, then resume regular schedule. • Crushing: rivaroxaban tablet CAN be crushed and mixed in apple sauce or water (and given via NG tube), but must be followed immediately by food if the dose is 15 / 20 mg. • Drug interactions: avoid strong CYP3A4 + P-gp dual inhibitors (ketoconazole, ritonavir) and inducers (rifampin, St. Johns wort, phenytoin, carbamazepine). • Bleeding precautions, do NOT self-discontinue, surgery hold per provider, andexanet alfa for major bleeding reversal.
In-depth explanation
Clinical reasoning summary Rivaroxaban administration — food matters at 15 / 20 mg Rivaroxaban is a direct factor Xa inhibitor. Bioavailability differs by dose: • 10 mg: ~80–100% bioavailability — can be taken with or without food. • 15 mg and 20 mg: bioavailability drops to ~66% on an empty stomach but reaches ~100% when taken WITH food. Patients on 15 / 20 mg must take with the largest meal of the day to ensure therapeutic levels and avoid stroke breakthrough. • Take at approximately the same time daily to maintain steady plasma levels.
Other key teaching: • Missed dose: if a once-daily dose is missed, take it as soon as remembered on the same day; if not, skip and take next day at usual time. For twice-daily dosing (DVT/PE treatment 15 mg BID), if a dose is missed, take it as soon as remembered to ensure 30 mg total per day, then resume regular schedule. • Crushing: rivaroxaban tablet CAN be crushed and mixed in apple sauce or water (and given via NG tube), but must be followed immediately by food if the dose is 15 / 20 mg. • Drug interactions: avoid strong CYP3A4 + P-gp dual inhibitors (ketoconazole, ritonavir) and inducers (rifampin, St. Johns wort, phenytoin, carbamazepine). • Bleeding precautions, do NOT self-discontinue, surgery hold per provider, andexanet alfa for major bleeding reversal.