To reduce the content of maxacalcitol produced by maxacalcitol analogues in a preparation when preparing an aqueous maxacalcitol-containing solution filled in a container.SOLUTION: The present invention relates to a method for producing an maxacalcitol-containing aqueous solution preparation filled in a container, comprising the steps of: (1) preparing the aqueous solution preparation filled in a container from raw material containing Maxacalcitol , And / or (2) the aqueous solution preparation is applied to a transport pipe having an inner wall surface formed of polytetrafluoroethylene And transporting it through the container.(FIG.
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