According to the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, deputy director of the Pharmacy Department, Xue Xiuqing, "caution, contraindication, prohibited," although only one word difference in the three words, but from the point of view of the safety of the drug is very different, patients must follow the doctor's instructions, carefully read the instructions, must pay attention to the meaning of which, so as not to cause trouble. The patient must follow the doctor's advice and read the instructions carefully. Use with caution Etymology: remind the patient to be careful when taking the drug, after taking, must carefully observe the patient with the drug after the emergence of any adverse reactions, such as must stop taking, if not can be closely observed to continue to take. Therefore, the use of caution is to tell the user, some people may be prone to adverse reactions to such drugs, to be careful to take, not that can not be used, some people may not have adverse reactions. Examples: Pregnant women should be cautious in using cold and flu medicines; Older people who often take anticoagulants such as aspirin can also cause gastrointestinal bleeding, so older people should also be cautious in taking prophylactic medicines. In addition, the drugs that should be noted include the use of elderly patients, focusing on the drugs that should be noted include: liver and kidney toxicity drugs, anticoagulants, digitalis drugs and sedative sleeping drugs, etc., to avoid adverse reactions and adverse consequences caused by drugs. Women should also be careful to use some anticoagulants or inhibit the function of platelets, such as warfarin, heparin, aspirin, etc. If you take anticoagulants at this time, it may lead to excessive menstrual blood, prolonged menstrual period or even menstrual cycle disorders. Suggestion: Generally speaking, when encountering medicines that are to be used with caution, one should consult a pharmacist to weigh the pros and cons before using them. Contraindication Etymology: A step beyond "use with caution", to the extent that it is not appropriate to use or avoid use. Drugs labeled as "contraindicated" mean that their adverse reactions are clearer and the possibility of adverse reactions is greater. However, due to individual differences in people, can not be generalized, so the word "contraindicated" to show that a group of people warning. For example: a bar under the age of children to avoid the abuse of antibiotics, because the drugs on the children's liver, kidney, auditory nerve, bone development, blood system may cause serious damage, especially tetracycline can be accumulated in the bone and teeth, so that the fetus delayed osteogenesis and enamel underdevelopment; streptomycin can be made to the auditory nerve function of the hearing loss, resulting in deafness; antiepileptic drugs and diazepam can be a chronic poisoning of the fetus, producing central inhibition, coagulation and other adverse reactions, such as the use of antibiotics. The drugs can produce central inhibition, coagulation dysfunction and so on. Women in the first trimester of pregnancy take drugs that are contraindicated for pregnant women, such as estrogen, progesterone, glucocorticoids, antiepileptic drugs, antitumor drugs, etc., it is possible to cause fetal malformation. The wind-cold cold people avoid using Shuanghuanglian oral liquid, Xia Sangju granules and so on. Suggestion: People who belong to the group of "contraindication" should stay away from these medicines as far as possible. Prohibited Etymology: It is the most severe warning to the use of drugs. "Prohibited" means absolutely forbidden to use, because the resulting reaction can be fatal. Example: Penicillins are contraindicated in people who have had an allergic reaction to them. Atropine should never be used in patients with glaucoma. Quinolone antimicrobials are contraindicated in pregnant women and children under the age of one bar. Aspirin is prohibited for children under one bar of age after they have had the flu or chicken pox, because aspirin tends to trigger Reye's syndrome. Recommendation: absolutely away from these drugs, patients who accidentally use the prohibited drugs, abnormalities, must immediately seek medical attention