Ishida Sanyaku was medical powder made and sold by the home of the parents of Toshizo HIJIKATA, a vice chief of the Shinsengumi (a paramilitary group of pro-shogunate ronin formed in Kyoto).
石田散薬（いしださんやく）とは新選組の副長、土方歳三の生家が製造、販売していた薬。