Skip to main content

Antacids use while Breastfeeding

Medically reviewed by Last updated on Jun 21, 2023.

Antacids Levels and Effects while Breastfeeding

Summary of Use during Lactation

Although no published information on the aluminum, calcium or magnesium content of milk during maternal antacid therapy could be found, additional intake of these minerals by a nursing mother is unlikely to surpass that found in other infant foods. In addition, oral absorption of aluminum and magnesium is poor. Because of these factors, reviewers generally consider antacid use during breastfeeding to be acceptable.[1-3] No special precautions are required.

Drug Levels

Maternal Levels. The aluminum content of human milk is normally lower than cow's milk and much lower than infant formula.[4,5] Magnesium is a normal component of human milk.[6] When magnesium is administered intravenously in large doses, milk magnesium levels are increased only slightly.[7] Calcium is a normal component of human milk.[6] Alginic acid and simethicone, which are components of some antacids are not absorbed orally.[1,8]

Infant Levels. Relevant published information was not found as of the revision date.

Effects in Breastfed Infants

Relevant published information was not found as of the revision date.

Effects on Lactation and Breastmilk

Relevant published information was not found as of the revision date.


Lewis JH, Weingold AB., Committee of FDA-Related Matters American College of Gastroenterology. The use of gastrointestinal drugs during pregnancy and lactation. Am J Gastroenterol. 1985;80:912–23. [PubMed: 2864852]
Broussard CN, Richter JE. Treating gastro-oesophageal reflux disease during pregnancy and lactation: What are the safest therapy options? Drug Saf. 1998;19:325–37. [PubMed: 9804446]
Richter JE. Review article: The management of heartburn in pregnancy. Aliment Pharmacol Ther. 2005;22:749–57. [PubMed: 16225482]
Fernández-Lorenzo JR, Cocho JA, Rey-Goldar ML, et al. Aluminum contents of human milk, cow's milk, and infant formulas. J Pediatr Gastroenterol Nutr. 1999;28:270–5. [PubMed: 10067727]
Mandić ML, Grgić J, Grgić Z, et al. Aluminum levels in human milk. Sci Total Environ. 1995;170:165–70. [PubMed: 7481740]
Neville MC. Calcium secretion into milk. J Mammary Gland Biol Neoplasia. 2005;10:119–28. [PubMed: 16025219]
Cruikshank DP, Varner MW, Pitkin RM. Breast milk magnesium and calcium concentrations following magnesium sulfate treatment. Am J Obstet Gynecol. 1982;143:685–8. [PubMed: 7091241]
Hagemann TM. Gastrointestinal medications and breastfeeding. J Hum Lact. 1998;14:259–62. [PubMed: 10205441]

Substance Identification

Substance Name


Drug Class

Breast Feeding


Milk, Human

Antacids, Oral

Anti-Ulcer Agents

Gastrointestinal Agents

Disclaimer: Information presented in this database is not meant as a substitute for professional judgment. You should consult your healthcare provider for breastfeeding advice related to your particular situation. The U.S. government does not warrant or assume any liability or responsibility for the accuracy or completeness of the information on this Site.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.