Clearing away heat and toxic materials, inducing diuresis to reduce swelling, promoting blood circulation and removing blood stasis. Verbena, also known as Agrimonia purpurea, Schizonepeta tenuifolia and Agrimonia tenuifolia, is a perennial erect herb native to Europe and distributed in most areas of East China, South China and Southwest China. Its roots and stems contain stachyose, and its leaves contain adenosine and β-carotene. It tastes bitter, pungent and slightly cold. Verbena has the effect of clearing away heat and toxic materials, and can be used for exogenous fever, damp-heat jaundice, edema, dysentery, malaria, diphtheria, etc. And it can also remove pus and wash hemorrhoids.

Verbena is beneficial to the detumescence of water, and has a good effect on damp-heat jaundice, edema and gonorrhea. Verbena has the effect of promoting blood circulation and removing blood stasis, and can be used to treat amenorrhea, abdominal distension, irregular menstruation and other diseases. Verbena is widely used in clinic, which can be used to treat malaria, diphtheria, infectious hepatitis, influenza, filariasis and schistosomiasis.