Prevacid (lansoprazole) is a medication in the group called proton pump inhibitors (PPI). These medications are used in treating heartburn as well as acid reflux disease. Prevacid works by blocking the enzyme in the stomach that makes acid. The side effects upon babies either through the mother or for Prevacid given directly to babies are classified by the United States Food and Drug Administration as "Category B." No known adverse effects should endanger babies through Prevacid, but no clinical studies (as of 2009) have proven the drug safe either.
Unknown Side Effects
While there are no known side effects for infants who are fed breast milk, Drugs.com advises against taking Prevacid while nursing. The website advises checking with your physician before taking Prevacid if you are nursing a newborn, because it isn't known if any adverse effects can pass through the milk to the baby.
Mental Retardation
Some forms of Prevacid contain phenylalanine, which could be harmful to the child of a nursing mother who has phenylketonuria. This malady can cause severe mental retardation due to the inability to process protein, according to the National Institutes of Health website. Those with phenylketonuria should avoid using Prevacid.
Allergic Reactions
Prevacid should not be given to children less than one year old, according to Drugs.com. Should the child accidentally be given any or if a baby is accidentally given Prevacid through breast milk, it is possible an allergic reaction can take place. Get immediate medical help if facial swelling, trouble breathing, hives or closing of the throat occurs in your baby.
