Peilan and Rhizoma Coptidis in water are used to clear heat and dry dampness (removing heat and drying dampness), diarrhea and detoxification (removing fire and toxicity in the body), etc. The basic effect of Peilan is to aromatize, express and relieve heat and dampness. The basic effects of Peilan are to aromatize dampness, express and relieve summer heat, awaken the spleen and open the stomach (promote the function of the spleen and stomach), and are mainly used to treat halitosis, sweetness and greasiness in the mouth, epigastric rumpus and vomiting, excessive salivation, superficial evidence of summer dampness, chest tightness and discomfort, and fever and lethargy, and so on. The adverse effects and contraindications of Perilla frutescens are not known. The basic efficacy of Huanglian is to clear heat and dry dampness, expel fire and detoxify toxins, and is mainly used in the treatment of damp-heat platitude (stomach distension and discomfort), diarrhea, jaundice, high fever and dizziness, insomnia and restlessness, epistaxis (vomiting of blood and nosebleed due to blood-heat), toothache, redness of the eyes, sores, carbuncles and swollen toxins, and other disorders. The adverse effects of Huanglian are not clear, and it is contraindicated for those with spleen and stomach deficiency (weak and cold spleen and stomach), and used with caution for those with yin deficiency that injures the body fluid. The effective dosage of Perilla and Rhizoma Coptidis in water is limited, if you want to achieve the therapeutic effect, it is recommended to carry out regular treatment under the guidance of a doctor, and not self-medication.