Huanglian is not toxic, but side effects such as dizziness, shortness of breath and nausea may occur after use, and it is recommended to take it under medical supervision. Huanglian is bitter in flavor and cold in nature, with the effects of diarrhea and detoxification (getting rid of fire and poisonous evils in the body), clearing heat and drying dampness (removing heat evils and drying dampness). It is mainly used in the treatment of vomiting and acid swallowing (swallowing the acid in the stomach that rushes up to the mouth and throat), carbuncles, swollen boils, insomnia (symptoms of heatiness in the heart and insomnia), damp-heat diarrhea (diarrhea caused by feeling damp-heat evils), blood-heat epistaxis (vomiting of blood and nosebleed due to blood-heat), and eye-redness and toothache. Huanglian is not toxic, but side effects such as dizziness, shortness of breath, nausea and panic may occur after taking it. Caution is advised when taking it for stomach deficiency and vomiting, spleen deficiency and diarrhea (diarrhea caused by weak spleen function), and wu-wei kidney diarrhea. It is recommended to take this medicine under the guidance of a doctor. If uncomfortable symptoms occur, stop taking the medicine immediately and seek medical advice promptly.