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Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006-.

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Drugs and Lactation Database (LactMed®) [Internet].

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Polyethylene Glycol

Last Revision: February 15, 2026.

Estimated reading time: 1 minute

CASRN: 25322-68-3

image 127314511 in the ncbi pubchem database

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

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.

Copyright Notice

Attribution Statement: LactMed is a registered trademark of the U.S. Department of Health and Human Services.

Bookshelf ID: NBK536694PMID: 30694626

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