To provide a method for predicting biokinetics of a medicinal component (component 1) obtained when administering one or more liquid pharmaceutical compositions containing the component 1 to mammals and their merits and demerits.SOLUTION : On the basis of the results of elution of a component 1 obtained by applying one or more liquid compositions containing a component 1 to ion exchange chromatography, predictions are made on pharmacokinetic parameters of the component 1 obtained by administering the composition to mammals and/or their merits and demerits.SELECTED DRAWING : None