After taking cold medicine, it is recommended that it is better to get pregnant after one month. There are many kinds of cold medicine ingredients, including Chinese preparations, compound preparations, and pure Western preparations, and the effects of different drug ingredients on the normal development of sperm, eggs and embryos are different, and the metabolism time of drugs is also different. Generally speaking, the metabolism period of cold medicine is about 1-2 weeks, and the pathogenic bacteria will exist in the body while taking cold medicine, so it takes some time to expel the pathogenic bacteria after taking the medicine. It is recommended that during the preparation period, we should pay attention to reasonable rest and rest, not to stay up late regularly so as not to affect the secretion of hormones in the body, avoid viral infections and ionizing radiation as much as possible, not to take drugs at will, and if we must take them, we need to choose relatively safe drugs under the guidance of doctors, and pay attention to folic acid supplementation to prevent neural tube malformation in the fetus.