source: Crunchyroll - Forum - Why do the Japanese do this?

(of a substance or plant) having healing properties:

〖通例名詞の前で〗薬用の, 薬用効果のある, 病気を治す; 薬臭い

e.g. medicinal herbs

e.g. humorous : a large medicinal Scotch.

relating to or involving medicines or drugs.

a medicinal substance.

medicinally |məˈdis(ə)nəlē| adverb

late Middle English: from Latin medicinalis, from medicina (see medicine).