The 999 cold medicine can be taken orally during the breastfeeding period, the 999 cold medicine belongs to the Chinese patent medicine, there is no adverse effect on the baby. 999 cold medicine is mainly used for the treatment of upper respiratory tract infections, during the period of taking the medicine, we should pay attention to prohibit eating cold, spicy and stimulating food. If you are allergic to 999 cold medicine, you should disable it, and if you are allergic to it, you should be cautious of using it. If you need to take 999 cold medicine together with other medicines, you need to consult your doctor in advance. In addition, in the breastfeeding period must pay attention to the use of drugs, because it is a drug three times poison, drugs have their own certain toxicity, it is recommended to take drugs in the breastfeeding period before consulting a doctor, so as to avoid the drug metabolism through the breast milk, the baby produce adverse reactions.