Provided are: zinc chloride hydroxide that is useful as a pharmaceutical ingredient, has excellent zinc ion sustained-releasbility when used as a pharmaceutical agent, and exhibits excellent stability as a pharmaceutical ingredient； and a production method therefor. The present invention pertains to zinc chloride hydroxide that can be used as a pharmaceutical ingredient, that has excellent zinc ion sustained-releasability, that comprises at least one member selected from the group consisting of zinc chloride, zinc hydroxide, and zinc oxide.
