<prompt> A drug is administered in a dose of 200 mg and its plasma concentration is 40 micro gramml. What is the volume of distribution -5 litre0?5 litre2?5litre3 litre  <response>: Ans. is a i.e., 5 litre The volume of distribution Dose administered iv --- Plasma concentration o So, to contain all the administered drug 200 mg, the required fluid will be 200 mg --- 40 mml 200 x 10-3 gm --- 40 x 10-6 gmml 5 x 103 ml 5000 ml 5L 