If you take a drug that you are allergic to without knowing that you are pregnant, there are still relatively many drugs that you are clinically allergic to. It is recommended to read the instructions of the drug carefully, and if the drug instructions clearly indicate that it is prohibited for pregnant women, it is recommended that the pregnancy needs to be terminated in clinical practice. This is because this condition may lead to fetal malformation or affect the development of the fetus, so it is not conducive to eugenics and requires termination of pregnancy. If the drug instructions state that it is to be used with caution in pregnant women, it is possible that it may have some effect on pregnancy in clinical practice, but it is a drug that can be used under the guidance of a doctor, and it is advisable to bring this drug to the Department of Eugenics for further consultation. If the doctor thinks that this drug has little effect on the embryo after eating it, it is recommended to continue to give pregnancy if you can.