It is mainly used for treating damp-heat jaundice, stone drenching (discharging gravel when urinating, or sudden interruption of urination, pain in the urethra, and intolerable pain in the waist and abdomen), carbuncle, swelling and furuncle, etc. The drug is derived from the dried whole herb of the primrose family. The drug source is the dried whole herb of the primrose family, with the efficacy of inducing dampness and removing yellow, diuretic and diuretic, detoxifying and subduing swelling, it can be used in the treatment of damp-heat jaundice, heat drenching (burning and stinging pain is obvious when urinating, accompanied by frequent urination and urgency, and discomfort of traction in the abdomen), stone drenching, astringent pain in urination, carbuncle, furuncle and snake and insect bites, and other diseases. Adverse reactions and contraindications are not clear. The use of drugs need to be under the guidance of a professional physician, do not unauthorized use of drugs to avoid adverse consequences.