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What will be the renal clearance if the rate of urinary excretion is 625 ml/min and plasma drug concentration is 4.2 ng/ml?

What will be the renal clearance if the rate of urinary excretion is 625 ml/min and plasma drug concentration is 4.2 ng/ml? Correct Answer 148.80ml2/ng min

Renal clearance is defined as the volume of blood which is completely cleared of the unchanged drug by the kidney. It is expressed as the rate of urinary excretion/plasma drug concentration. Thus the answer is 625/4.2 = 148.80 ml2/ng min.

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