Er Zhi Wan can exert the effects of tonifying the liver and kidney, nourishing yin and stopping bleeding (nourishing the yin fluid and stopping bleeding), and is effective in treating patients with yin deficiency of the liver and kidney (insufficient yin fluid in the liver and kidney). Er Zhi Wan is a proprietary Chinese medicine with the efficacy of tonifying the liver and kidneys, nourishing yin and stopping bleeding, and its main ingredients include only two Chinese herbs, namely, steamed chasteberry and Murraya. The drug is mainly used for the symptoms of lumbar and knee pain, dizziness and tinnitus, dry throat and nose, and heavy menstruation due to deficiency of yin in the liver and kidneys. Er Zhi Wan is contraindicated in patients who are allergic to the product and is not recommended for patients with colds and fever. There are no clear adverse drug reactions. Indigestible food should be avoided during treatment with the drug. Specific drugs should be under the guidance of a specialist, not self-medication.