noun
dried Swertia japonica (traditional medicine)
Refers specifically to the dried herb of Swertia japonica, used in traditional Japanese medicine. Also known as 千振 (せんぶり).
See also: 千振
当薬は胃腸薬の原料として用いられる。
Dried Swertia japonica is used as an ingredient in gastrointestinal medicines.
千振 is the more common name for the plant Swertia japonica itself, while 当薬 specifically refers to the dried herb used in medicine.
The term 当薬 (とうやく) literally means 'appropriate medicine', reflecting its use in traditional remedies. The exact historical derivation is uncertain.