The issue of medication for early pregnancy colds is a common concern for many people. What is the best way to use medication? Early pregnancy (about 12 weeks after the fertilization of the egg) is an important stage from the division of the fertilized egg to the differentiation and formation of the various organs of the fetus. If the differentiation and reproduction of embryonic cells are disturbed by external factors during this period, it may lead to fetal malformation. If a pregnant woman uses drugs that are toxic to the embryo during early pregnancy, it may stop the development of the embryo and cause miscarriage or even fetal malformation. In order to ensure the safety of drugs for pregnant women, the U.S. Food and Drug Administration (FDA) issued a perinatal use of a variety of drugs on the fetal risk grouping method, divided into A, B, C, D, and X five levels. Class A drugs are considered harmless to the embryo and fetus; Class B drugs are basically harmless to the embryo and fetus; Class C drugs should be used only when the benefits outweigh the harms before application; Class D and X drugs are harmful to the embryo and fetus, especially Class X drugs are prohibited during pregnancy. Therefore, from the safety point of view, A and B grade drugs are safe for pregnant women. Generally speaking, the conventional herbal medicines for cold and flu are harmless to the embryo and fetus. Most of the commonly used western medicines for cold and flu that have been approved and produced by the State Drug Administration are compounded medicines, including antipyretic and analgesic medicines, anti-allergic medicines, cough medicines, etc. Their portion and combination, if taken for a short period of time, will not lead to fetal malformation.