1, heat-clearing Chinese medicine: Chinese medicine believes that the evidence of dry heat, such as fever, fire, etc., should be treated with heat-clearing agents, which should not be served with hot water. The use of cool boiled water can increase the effectiveness of heat-clearing drugs. 2, active bacteria drugs: lactase raw contains lactic acid active bacillus, whole intestine raw contains bacillus licheniformis, mommy love contains streptococcus faecalis and bacillus subtilis, he Shengyuan (children’s probiotic punch) contains lactobacillus acidophilus and bifidobacterium. In addition, yeast tablets, Rejuveno and other drugs contain active bacteria used for disease prevention and treatment, and the active bacteria will be destroyed when exposed to heat. 3, live vaccines: such as polio sugar pills, containing live attenuated polio vaccine, should be taken with cool boiled water, otherwise the vaccine inactivation, can not play the role of immune organism, prevention of infectious diseases. 4, cough syrup class: acute syrup, compound licorice combination, honey refining Chuanbei loquat, etc., is a class of drugs prepared by dissolving cough anti-inflammatory ingredients in syrup or infusion. After patients take them, the syrup or paste covers the inflamed mucous membrane of the pharynx to form a protective film, which facilitates rapid control of cough and relief of symptoms. If taken with hot water, it is easier to reduce the viscosity of the syrup and affect the efficacy of the protective film. 5. Vitamins: For example, vitamin C is unstable and can be easily reduced and destroyed when exposed to heat, thus losing its effectiveness. 6, digestive aid: such as pepsin combination, pancreatic protease, multi-enzyme tablets, yeast tablets, etc., all contain enzymes to help digestion. Enzyme is a kind of active protein, which will be coagulated and denatured when exposed to heat.