non-medicinal
/ˌnɒnmɪˈdɪs(ə)n(ə)l/ /ˌnɒnmɪˈdɪsɪn(ə)l/adjective
Of a substance: not medicinal, not used as a medicine, or lacking medicinal properties (especially with reference to a substance that is not used in conventional western medicine); not involving (the use of) such substances.
Origin
Mid 19th century. From non- + medicinal.