What kind of stomach problems are treated by Zuojin Wan?

Zuo Jin Wan can treat stomach disorders caused by liver fire (fire produced by the liver invading the stomach), symptoms of which may include bitter, noisy mouth and vomiting of sour water.
The ingredients of Zuo Jin Wan mainly include Rhizoma Coptidis and Cornu Cervi Pantotrichum, which have the efficacy and functions of dispersing the liver, harmonizing the stomach, diarrhea and pain relief, and are suitable for treating symptoms associated with liver fire that violates the stomach, including bitter mouth, noisy (stomach sensation similar to hunger, emptiness with burning), vomiting of acidic water, pain in the epigastrium, and a dislike of hot beverages.
It is advisable to have a light diet and avoid alcohol and spicy, cold and oily food during the course of administration; emotionally, avoid anger and depression, and keep a relaxed mood.
Adverse reactions and contraindications associated with the use of medication is not clear, not applicable to people with spleen and stomach deficiency and cold (spleen and stomach weakness and cold). Specific medication matters should be directed by a physician, not self-medication.