Kidney concretions are derived from the bladder stones of Bos taurus domesticus Gmelin (commonly known as cattle), Bubalus bubalis Linnaeus (commonly known as water buffalo), or sus scrofa domestica Brisson (commonly known as pigs). When slaughtering cattle or pigs, the bladder is examined for the presence of stones. If stones are found, they are removed, cleaned, and dried.
[Processing method] The raw material is taken and impurities are removed. Ash and debris are sieved out.
[Appearance of prepared slices] The slices are oval or spherical in shape, varying in size. The surface can be white, dark yellow, or golden brown. It is smooth and shiny, lightweight, and firm in texture.
[Processing effect] Kidney concretions have a neutral nature. They have the function of promoting urination and eliminating concretions. After processing, impurities and debris are removed, making the medicine purer. It is used for urinary calculi.
