Amount of a drug X administered to a patient is 4.0 g and its plasma concentration is found to be 50 mg/ml, what will be the volume of distribution of drug X?

Amount administered = 4 g = 4000 mg Plasma concentration = 50 mcg/ml = 50000 mcg/L = 50 mg/L Vd = Amount administered/Plasma concentration = (4000 mg)/ (50 mg/L) = 80 L