The dosage of cinnamon is usually 1 to 5g, and that of Rhizoma Coptidis is 2 to 5g. However, it is not as effective to be taken in infusion as in decoction, so it is recommended to take it in decoction under the guidance of a doctor. Cinnamon can replenish fire and assist yang, draw fire back to the source (inhibit the rising of fire evil in the kidneys), dissipate cold and relieve pain, and warm the meridians. It is used for impotence, coldness in the uterus, cold pain in the waist and knees, asthma due to deficiency of the kidneys, deficiency of yang (relative deficiency of yang qi affecting the head and face), dizziness and redness of the eyes, cold pain in the heart and abdomen, vomiting and diarrhea with deficiency of cold, cold hernia and abdominal pain (acute abdominal pain caused by deficiency of cold in the internal organs and the feeling of cold in the external wind), and menstrual dysmenorrhea and menstrual occlusion. Huang Lian can clear heat and dry dampness, diarrhea and detoxification. It is used in treating damp-heat plumpness (stomach distension and discomfort), vomiting and acid swallowing (swallowing the acid in the stomach), diarrhea, jaundice, high fever and dizziness, excessive fire in the heart, disturbing and insomnia (disturbing and hot in the heart, insomnia), palpitation, epistaxis (vomiting of blood and nosebleed due to blood heat), redness of the eyes, toothache, thirst and carbuncle, swollen furuncle; and in treating externally eczema, moist sores, and pus in ear canals. Patients in need are advised to seek medical treatment promptly