Pharmaceutical Name: Fructus Psoraleae Botanical Name: Psoralea Corylifolia L. Common Name: Psoralea Fruit Source of Earliest Record: Yaoxing Lun Part Used & Method for Pharmaceutical Preparations: The ripe fruit is gathered in autumn, and then it is dried in the sun. Properties and Taste: Bitter, pungent and very warm Meridian: Kidney and spleen Functions: To tonify kidneys and strengthen yangTo prevent emissions and nocturnal urinationTo warm the spleen and stop diarrhea Indications and Combinations: 1. Deficient kidneys manifested as impotence and soreness and weakness of the lower back and knees. *Use with Dadder seed (Tusizi), Cistanche (Roucongrong) and Eucommia bark (Duzhong). 2. Nocturnal urination and emissions due to kidney deficiency. *Use with Bitter cardamom (Yizhiren) and Dioscorea (Shanyao).3. Diarrhea due to deficiency of yang of the spleen and kidneys.*Use with Evodia fruit (Wuzhuyu), Nutmeg (Roudoukou) and Schisandra fruit (Wuweizi) in the formula Sishen Wan. Dosage: 5-10 g Cautions: This herb is contraindicated in cases with deficiency of yin with excessive fire as well as constipation.