In traditional Chinese medicines, Cortex Dictamni is prescribed for the treatment of a variety of inflammatory diseases such as acute rheumatoid arthritis, skin inflammation and jaundice.

Dictamni Cortex is the dried root bark of Dictamnus dasycarpus Turcz. (Rutaceae). The root is collected in spring and autumn, the soil and fibrous roots removed, washed clean, then incised vertically. Afterward, the root bark is stripped off, then dried immediately to obtain Dictamni Cortex.