What effects does Rhizoma Coptidis have on human body?

Indications: clearing heat and promoting diuresis, purging fire and detoxicating. It can be used for treating damp-heat fullness, vomiting and diarrhea, jaundice, dizziness due to high fever, hyperactivity of heart fire, restlessness, blood-heat vomiting, red eyes and acid swallowing, toothache to quench thirst, carbuncle and furuncle; Externally used to treat eczema, wet sores and pus in ear canal. Wine and coptis root are better than fire. It is used for treating aphtha with red eyes. Turmeric even clears the stomach and stops vomiting. For cold and heat, damp-heat obstruction, fullness and vomiting. Yuhuanglian soothes the liver and stomach to stop vomiting. Used for disharmony between liver and stomach, vomiting and acid swallowing.