Is "LactBase" the Same as LactMed? Sorting Out the Names of the Lactation Drug Database
No federal lactation database is published under the name LactBase. The resource that nearly everyone means when they type that word, or lacmed, lactemed, or lact med, is the Drugs and Lactation Database (LactMed), a free, peer-reviewed reference maintained within the National Institutes of Health's literature collections and hosted on the NCBI Bookshelf at the LactMed record set. The variant spellings are search-box artifacts, not separate products.
Why the name gets garbled
LactMed is a compressed form of "lactation" and "medications," and compressed names are unstable in ordinary speech. Spoken aloud, the term splits easily into two words, which produces lact med and lac med. Typed quickly, the cluster of consonants invites lacmed and lactemed. The form LactBase appears to come from a different instinct: the user remembers that the thing is a database, and reaches for the -base suffix familiar from other reference products. All of these land, through search engines, on the same underlying resource.
A second source of confusion is institutional. LactMed is referred to by several accurate but non-identical labels: by its formal title, Drugs and Lactation Database; by its short name, LactMed; by its publisher, as an NIH or National Library of Medicine resource; and, in older materials, as part of a toxicology and environmental health information system that has since been reorganized. A reader who encounters two of these labels in two documents may reasonably conclude there are two databases. There is one. The practical consequence of the reorganization is that bookmarks and citations written years ago may point to retired addresses, which is covered in more detail in our page on where LactMed is hosted and how to reach it.
How to tell you have the genuine resource
Three checks are usually enough. First, the address: the authentic records sit under the ncbi.nlm.nih.gov domain, in the Bookshelf collection. Second, the price: access is free, with no account, subscription, or trial, so any page demanding payment for "LactMed" is a repackager rather than the source. Third, the shape of the record. A genuine entry follows a fixed internal structure, with separate sections for effects on lactation and breastmilk, effects on the breastfed infant, alternative substances to consider, and a numbered reference list drawn from the published literature. Our walkthrough of how to read a LactMed record describes those sections in order.
Third-party apps, nursing-school handouts, and commercial drug references frequently summarize LactMed content. Summaries age, and they drop the citations that make the original useful, so the entry itself remains the thing to check.
What the database is, and what it is not
LactMed is a literature-summarizing reference. Each entry gathers what the published research reports about a particular drug, herb, dietary supplement, or other substance in relation to breastfeeding, and attributes each statement to a source. It is written for clinicians and for the general public alike, which is unusual among drug references and explains why it surfaces so often in ordinary web searches.
It is not a decision engine, and it does not issue verdicts on individual cases. Entries describe findings and their limits; they do not tell a specific person what to take or stop taking. Treatment decisions belong to a clinician who knows the patient, and parent-facing bodies such as the Office on Women's Health and the American Academy of Pediatrics' parent site exist partly to connect families with that kind of individualized help. For caregivers in training, the value of LactMed is different and narrower: it is where you learn the vocabulary a lactation discussion uses, and where you see what a properly cited claim looks like. A general orientation to the database is in what LactMed is and who it is for.
Other resources with similar names
Several other free lactation references circulate internationally, some with names that also begin with lact-. They differ in publisher, language, update cadence, and how explicitly they rate substances. Because the names are easy to mix up, it is worth knowing which one you are reading before you quote it; the differences are laid out in our comparison of LactMed and the other free lactation references.