In a patient with atrial fibrillation and severe renal impairment (eGFR ~22), which direct oral anticoagulant is contraindicated due to renal function?

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Multiple Choice

In a patient with atrial fibrillation and severe renal impairment (eGFR ~22), which direct oral anticoagulant is contraindicated due to renal function?

Explanation:
The key idea is how kidney function affects the safety of direct oral anticoagulants. When eGFR is very low, drug exposure can rise, increasing bleeding risk. Dabigatran is mostly cleared by the kidneys (the majority of its elimination depends on renal excretion). With an eGFR around 22, dabigatran can accumulate to dangerous levels, so it is contraindicated in this setting. The other DOACs rely less on renal clearance and can often be used with dose adjustments in reduced renal function, making them acceptable options where appropriate.

The key idea is how kidney function affects the safety of direct oral anticoagulants. When eGFR is very low, drug exposure can rise, increasing bleeding risk. Dabigatran is mostly cleared by the kidneys (the majority of its elimination depends on renal excretion). With an eGFR around 22, dabigatran can accumulate to dangerous levels, so it is contraindicated in this setting. The other DOACs rely less on renal clearance and can often be used with dose adjustments in reduced renal function, making them acceptable options where appropriate.

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