Breastfeeding women should be careful with medication, because the metabolic mechanism in the breastfeeding infant is not perfect, breastfeeding women use drugs, milk can contain the drugs used, so that the health of the nursing infant is damaged. There are no strict eight categories of prohibited drugs during breastfeeding, drugs that may cause harm to the infant should be used with caution or prohibited, must be used under the guidance of a doctor, usually seen in the following: 1, sulfa drugs: breast milk containing sulfa drugs can lead to nuclear jaundice in infants, such as the lack of glucose-6-phosphate dehydrogenase in the infant’s body, the abnormal sensitivity to sulfa drugs in breast milk, can cause hemolytic anemia; 2. Chloramphenicol: such as taking regular doses of chloramphenicol, may cause infants diarrhea, vomiting, respiratory insufficiency, circulatory failure, skin graying and other symptoms, tetracycline, doxycycline may cause infant mastodontic damage; 3, sedative-hypnotic drugs: diazepam, alprazolam and other anti-anxiety, sedative-hypnotic drugs may make infants suffer from hyperbilirubinemia; 4, some antiviral drugs: adenosine, acyclovir, Amantadine, Ganciclovir, Ribavirin, etc., have teratogenic, carcinogenic, bone marrow suppression and other adverse reactions, breastfeeding women need to prohibit breastfeeding when taking this drug; 5, strong analgesics: morphine, Mephtalol, etc., may inhibit the respiratory center, endangering the life of the infant; 6, antithyroid drugs: breastfeeding women who overuse propylthioxypyrimethamine, may lead to infants with hypothyroidism, nodular 7, antipyretic and analgesic drugs: such as aspirin, can affect the healthy development of infants; 8, some Chinese medicinal preparations: containing toxicity, blood circulation and blood stasis effect of Chinese medicines are prohibited or caution, such as croton, strychnine, musk, senna, etc.