Source: Wenbing Tiaobian (Detailed Analysis of Seasonal Febrile Diseases).

Ingredients:
No.1  Qinghao (Herba Artemisiae) 6 g
No.2  Biejia (Carapax Trionycis) 15 g
No.3  Shengdihuang (Radix Rehmanniae) 12 g
No.4  Zhimu (Rhizoma Anemarrhenae) 6 g
No.5  Mudanpi (Cortex Moutan Radicis) 9 g

Administration:
Decoct the above drugs in water for oral administration.

Actions:
Nourishing yin and clearing away heat.

Clinical Application:
This recipe is suitable for latent pathogenic factors in yinfen at the late stage of seasonal febrile diseases, marked by fever at night and normal temperature in the morning, no perspiration after fever subsides, reddened tongue with little fur, thready and rapid pulse. It is applicable to infantile summer heat, chronic pyelonephritis, postmeasles pneumonia, renal tuberculosis and other diseases with unrelieved low fever for unknown reasons, which pertain to deficiency of yin fluid and latent heat in the interior. In case of dominant heat of deficiency type concomitant with steaming sensation in the bones and hectic fever, add Digupi (Cortex Lycii Radicis) and Huhuanglian (Rhizoma Picrorhizae). In case of severe impairment of yin fluid, thirst and dryness of the lips, add Tianhuafen (Radix Trichosanthis) and Maimendong (Radix Ophiopogonis) to nourish yin and promote the production of body fluid.

Elucidation:
This syndrome results from latent heat accumulating in yinfen at the late stage of epidemic febrile diseases because of the impairment of yin fluid and unsubdued heat. It should be treated by nourishing yin to expel heat from the interior. Ingredient No. 2 is used to nourish yin and clear away heat and No. 1 to expel heat from the interior. Both are used as monarch drug to nourish yin fluid and expel latent heat. Ingredient No. 3, capable of removing heat from blood and nourishing yin, and No. 4, nourishing yin and descending fire, help ingredient No. 2 nourish yin and dispel heat of deficiency type. Both are used as minister drug. Ingredient No. 5 is able to remove heat from blood and help No. 1 expel the remaining heat, acting as adjuvant drug.

Cautions:
Since Ingredient No. 1 is intolerant of high temperature, it should be soaked in boiling water for oral application, and the rest decocted.