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LactMed, part of the National Library of Medicine's (NLM) Toxicology Data Network (TOXNET®), is a database of drugs and dietary supplements that may affect breastfeeding. It includes information on the levels of such substances in breast milk and infant blood, and possible adverse effects in the nursing infant. Suggested therapeutic alternatives to those drugs are provided, where appropriate. All data are derived from the scientific literature and fully referenced. Summaries of the reported information are provided and include links to other NLM databases. Supplemental links to breastfeeding resources from credible organizations are also provided.

What's New

Version 3.1

New data update

Customer Reviews

3.5 out of 5

6 Ratings

6 Ratings



When looking up Norco 5/325 the information given is for acetaminophen only. This is extremely dangerous given the nature of this app is drug safety for a nursing infant. Glad I know there is more than just acetaminophen in those pills but some people may not and that's scary! Please fix this! Also the most recent cited information resource is from 1987. There must be more recent information available. Dr. Hale is known as the leading authority on drug interactions with breastfeeding and his work isn't referenced at all. What is goin on here? I thought this was going to be a respectable resource. Glad I did some double checking for the sake of my baby. I'll stick to the infant risk website. A great resource for any breastfeeding mother!



I recommend this to any nursing mother, nurse, lactation consultant, pharmacist, and pediatrician. It is easy to use, and gives you all the info you need. I love that it includes not only the effect on infants but also on a mother's milk supply itself! So important, especially when a woman is first establishing her lactation! My sister-in-law is a pharmacist, and when I showed her the app to get her opinion, she said it was fantastic, downloaded it herself and recommended it to her colleagues.

Truly a lifesaver


Thank you so much, not only for creating this app but also for the research behind it! The two combined are the most powerful resource! I have been able to look up a medication while still sitting in the doctor's office and it is amazing how uninformed most are about the medication they prescribe. You are doing a great service to mothers and children, and therefore, everyone, by continuing this work.


National Library of Medicine
9.8 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
You must be at least 17 years old to download this app.
Frequent/Intense Medical/Treatment Information
© 2016 National Library of Medicine


  • Family Sharing

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