Zuo Jin Wan can be taken by people with Yin deficiency and fire in the right condition. Zuo Jin Wan is a traditional Chinese medicine formula from the book Dan Xi Xin Fa, which is a fire-reducing agent composed of two Chinese herbs, Huang Lian and Wu Zhu Zhu, in a ratio of 6 to 1. It has the efficacy of dredging the liver, fire-reducing, stomach-relieving and pain-relieving and is mainly used for the treatment of vomiting, generalized acidity, noisiness, coercive and rib pain, cholera and cramping, etc., which are caused by the fire of the liver and the stomach. The adverse effects of this drug are not clear, but it should be noted that the formula emphasizes the use of bitter and cold flavonoids, so it is contraindicated in people with deficiency and coldness in the spleen and stomach. It can be taken by people with yin deficiency and fire exuberance as prescribed by the doctor if it is symptomatic. If there are symptoms, it is recommended to consult a doctor for standardized treatment.