We often say: “All medicines have three toxins”. So far, mankind has not discovered and developed a drug without toxicity and side effects. There is only a difference between a large and small amount of toxicity and side effects. We all know that drugs are used to treat diseases. However, any drug has two sides. Usually when we apply drugs to treat diseases, if the use of unreasonable, incorrect words, the drug will become a disease causing poison. As “water can float a boat, it can also overturn a boat”. Therefore, whether as doctors or patients, we should not only be familiar with the indications, usage and dosage of drugs, contraindications, etc., but also must understand the toxic and side effects of drugs, so that we pay great attention to them. 1, should pay great attention to the individual differences of patients, because, individual differences is a more complex multifaceted factors. If different patients suffer from the same disease, the efficacy and adverse reactions to the same drug can appear very different. That is, different groups of people suffering from the same disease with the same drug treatment, there may be the following situations: (1) A group of people after the drug is effective and no adverse reactions (toxic, side effects); (2) B group of people after the drug is also effective but there are obvious adverse reactions (toxic, side effects); (3) C group of people after the drug is not effective and no adverse reactions (toxic, side effects); (4) D group of people after the drug is not only (4) Category D people not only ineffective but also have obvious adverse reactions (toxicity, side effects). Another situation is that if different patients suffer from different diseases with the same clinical symptoms (disease mechanism), they can be treated with the same medicine and may benefit from the same medicine and be cured or get better. This is the method of “different treatment for the same disease and different treatment for the same disease”, as Chinese medicine often says. 2, in view of the individual differences of patients and the complexity and diversity of diseases, as a doctor before prescribing drugs to patients, should fully understand the patient’s condition in detail, and on this basis to make a correct diagnosis; then, depending on the person and the different diseases to patients to choose the appropriate drugs, dosage, dosage, medication methods and treatment course. And at any time to do a good job of follow-up observation of patients after the use of drugs. 3, give full play to the doctor’s professional expertise and decision-making, as a doctor should be correct diagnosis and reasonable treatment of each seeker, so that the patient to achieve the purpose of disease healing or pain relief. We should master the characteristics of drugs and understand the patient’s condition, and give full play to our decision-making and bridging role. Choose the safe and effective drug or the best treatment for the patient. Given that the efficacy and toxic side effects of drugs cannot be predicted in advance during clinical use, physicians should be prepared to treat patients beforehand. Therefore, doctors should do a good job of patient explanation before treatment and follow-up observation after treatment. Maximize the benefits of drugs and avoid the harms of drugs. In daily life, it is common to take drugs (including health care products) or use them indiscriminately (without doctor’s permission). This is because medicine is not an essential nutrient for the human body. It is a special substance used to regulate the body’s abnormal internal organs and tissues functions, and to get rid of the disease and toxins (various viruses, harmful bacteria and parasites, etc.) that live inside and outside the body. Therefore, we must change the old concept in the future, “do not have a sickness, and do not have a sickness, do not take medicine”. Whenever you have a disease, you should go to the hospital for examination, make a correct diagnosis, and then use drugs reasonably. We often say: “The doctor, benevolent heart, life of the family.” “Human life is a matter of life and death.” As a doctor should not only have a solid knowledge of medicine, medicine, but also should have the noble character of wholeheartedly serving the patients. Only then can patients safely and securely treat their diseases, maintain their health and enjoy a good life.