Olanzapine may affect fetal development, so after men take the drug before women get pregnant, pregnant women need to strengthen the pregnancy test, according to the results of the test to determine whether it is necessary to terminate the pregnancy. There are no clinical experiments and data that clearly show that olanzapine has teratogenic side effects, but because olanzapine has large side effects, adverse effects on the liver, brain and endocrine, men may harm the fetus after they become pregnant by coitus with a woman during the use of the drug. Olanzapine is often used to treat schizophrenia, manic episodes, and other disorders. Adverse effects such as drowsiness, weight gain, and elevated blood sugar may occur during the use of the drug. The drug is contraindicated in patients who are allergic to the components of the drug and have narrow-angle glaucoma. After taking the drug, patients should be extra careful when operating dangerous instruments. In case of the above, men are advised to promptly tell the doctor the truth. In addition, during pregnancy, it is necessary to actively screen the chromosomes of the fetus, as well as the exclusion of various organ and organ systems, and in the event of the detection of fetal malformations, it is usually recommended to terminate the pregnancy. In addition, the above drugs should be used under the guidance of a doctor, to avoid unauthorized use of drugs, so as not to cause adverse effects.