Skip Navigation

Fact Sheet
Drugs and Lactation Database (LactMed)

Return to Web VersionPrinter-friendly VersionPrinter-friendly Version

LactMed, part of the National Library of Medicine's (NLM) Toxicology Data Network (TOXNET®), is a database of drugs and other chemicals to which breastfeeding mothers may be exposed. It includes information on the levels of such substances in breast milk and infant blood, and the possible adverse effects in the nursing infant. Statements of the American Academy of Pediatrics concerning a drug’s compatibility with breastfeeding are provided, as are suggested therapeutic alternatives to those drugs where appropriate. All data are derived from the scientific literature and fully referenced. Data are organized into substance-specific records, which provide a summary of the pertinent reported information and include links to other NLM databases. Supplemental links to breastfeeding resources from credible organizations are also provided.

Web Access/Searching

LactMed is accessible, free of charge, via TOXNET at:

Users can search by drug or chemical name, Chemical Abstracts Service Registry Number (RN), pharmacologic category, and/or subject terms. Search results can easily be viewed, printed or downloaded. Search results are displayed in relevancy ranked order, but may be sorted by publication date, author or title.

Further Information

For detailed information about LactMed or TOXNET, contact:

National Library of Medicine
Specialized Information Services
Two Democracy Plaza, Suite 510
6707 Democracy Boulevard, MSC 5467
Bethesda, MD 20892-5467
Telephone: (301) 496-1131
FAX: (301) 480-3537

For information on the NLM services, contact:

Customer Service
National Library of Medicine
8600 Rockville Pike
Bethesda, MD 20894
Telephone: 1-888-FINDNLM (1-888-346-3656)

A complete list of NLM Fact Sheets is available at:
(alphabetical list)
(subject list):

Or write to:

Office of Communications and Public Liaison
National Library of Medicine
8600 Rockville Pike
Bethesda, Maryland 20894

Phone: (301) 496-6308
Fax: (301) 496-4450