CASRN: 25322-68-3
Drug Levels and Effects
Summary of Use during Lactation
Polyethylene glycol is very poorly absorbed from the gastrointestinal tract, so it does not enter breastmilk.[1] No special precautions are required and it may be the laxative of choice during breastfeeding.[2,3]
Drug Levels
Maternal Levels. Relevant published information was not found as of the revision date.
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.
Alternate Drugs to Consider
(Constipation) Bisacodyl, Docusate, Magnesium Hydroxide, Psyllium, Sodium Phosphate; (Irritable Bowel Syndrome) Linaclotide, Lubiprostone, Plecanatide, Psyllium, Tenapanor
References
- 1.
- Clowse ME, Förger F, Hwang C, et al. Minimal to no transfer of certolizumab pegol into breast milk: Results from CRADLE, a prospective, postmarketing, multicentre, pharmacokinetic study. Ann Rheum Dis 2017;76:1890-6 [PMC free article: PMC5705850] [PubMed: 28814432]
- 2.
- Lewis JH, Weingold AB and the 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]
- 3.
- Gharehbaghi K, Gharehbaghi DR, Wierrani F, et al. Treatment of chronic functional constipation during pregnancy and lactation. Z Geburtshilfe Neonatol 2016;220:9-15 [PubMed: 26866689]
Substance Identification
Substance Name
Polyethylene Glycol
CAS Registry Number
25322-68-3
Drug Class
Breastfeeding
Lactation
Milk, Human
Gastrointestinal Agents
Laxatives
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Publication Details
Publication History
Last Revision: February 15, 2026.
Copyright
Attribution Statement: LactMed is a registered trademark of the U.S. Department of Health and Human Services.
Publisher
National Institute of Child Health and Human Development, Bethesda (MD)
NLM Citation
Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006-. Polyethylene Glycol. [Updated 2026 Feb 15].