Omeprazole is not recommended for women who are breastfeeding because excretion through breast milk can be sucked by the infant. Omeprazole has certain side effects, such as causing abnormal elevation of transaminases in the liver, and possibly drowsiness, insomnia, and peripheral nerve inflammation, so it may have a greater impact on the infant and is not recommended to be taken, and other medications can be considered for treatment. Omeprazole is mainly used to treat gastric ulcers, duodenal ulcers, in addition to reflux esophagitis can also be treated with this drug. Do not use the medication without permission, it is best to find out the cause of the disease before giving the appropriate medication. The use of drugs during breastfeeding must be careful, because some drugs are excreted through breast milk and can affect the growth and development of the baby after being absorbed.