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If 100 mg of a drug are administered intravenously, and the resultant drug plasma concentration is determined to be 2.5...

If 100 mg of a drug are administered intravenously, and the resultant drug plasma concentration is determined to be 2.5 ug/mL, calculate the apparent volume of distribution. The correct answer is 40 L. Please show how this question is solved.

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* Apparent volume of distribution.

           Formula

             Volume of distribution (VD) = Drug mass / concentration.

              Drug mass = 100 mg.

             Concentration = 2.5 mcg / ml

                       VD = 100 / 2.5

                              = 40 L.

       

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