If a drug's clearance is significantly reduced due to impaired renal function in a patient with chronic kidney disease, which consequence is most likely?

💡 Explanation

With impaired renal function, drug clearance decreases because the kidneys cannot effectively remove the drug from the body; therefore, the drug's plasma concentration increases, elevating the risk of toxicity, rather than the drug concentration decreasing or affecting bioavailability or first-pass metabolism.

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