Last updated 9 August 2026 · Originally published 6 February 2023
Health authorities advise breastfeeding mothers to avoid CBD. The FDA says so explicitly; the CDC advises against cannabis while nursing and notes that CBD’s effects are unknown.
There’s one practical detail behind that advice which most articles skip: there is no evidence-based waiting period for CBD while breastfeeding. Pumping and discarding milk once can’t be assumed to solve the problem.
Why there’s no reliable timing rule
With alcohol, concentrations in milk rise and fall broadly alongside those in blood. Pumping doesn’t make alcohol clear any faster, but waiting until it has cleared does work.
For CBD, nobody has measured how long it stays in breast milk after a dose. THC has been detected anywhere from six days to more than six weeks depending on the study and the pattern of use[1] — but that’s THC data, and it shouldn’t be presented as though it applies to CBD.
What can be said is simpler. There’s no validated number of hours after taking CBD at which milk can be assumed free of it. Pumping removes the milk that’s there at that moment; it doesn’t speed up how quickly your body clears a substance. So someone using CBD regularly can’t rely on timing, or on a single pump-and-dump, to prevent exposure.
What’s actually known
Less than you’d hope.
CBD hasn’t been studied in nursing women taking the pharmaceutical product. It has been detected in the breast milk of some mothers who used cannabis products — so it does transfer — but nobody has established how much reaches an infant from ordinary CBD use, or what that exposure does.[2]
LactMed, the reference database clinicians use for drugs in breastfeeding, is direct about it: prescription CBD hasn’t been studied in nursing women, and an alternative anti-seizure medicine may be preferable, particularly while nursing a newborn or preterm infant.[2]
Worth keeping that in proportion. Plenty of medicines transfer into breast milk, and for most of them the amount an infant actually receives is small enough to be considered compatible with nursing — that’s the usual finding, not the exception.
There’s one estimate that points that way. A computer model, built from milk samples donated by cannabis users rather than women taking CBD products, predicted that a fully breastfed infant’s CBD exposure would be less than 1% of what children aged four to ten receive taking prescription CBD for epilepsy.[2]
That sounds reassuring, and it may well be. But it’s a model rather than a measurement in infants whose mothers took a known CBD dose, and it says nothing about whether even that small exposure is safe for a newborn or a preterm infant.
Animal work adds to the caution. Studies in pregnant animals have reported effects on the developing male reproductive system, among other findings. Those doses were high and animal data doesn’t transfer directly — but a newborn’s brain is developing rapidly, and CBD is neurologically active.
The product problem, again
Retail CBD is inconsistently labelled. A 2024 analysis of oils, gummies, vapes and topicals found 74% differed from their stated CBD content by at least 10%, and testing has turned up pesticides, heavy metals and residual solvents.[3]
THC turns up in products that shouldn’t contain it. And THC transfer into milk is much better documented than CBD’s: in one small controlled study, the estimated infant intake was 2.5% of the mother’s weight-adjusted THC dose, ranging from 0.4% to 8.7%.[1]
So the uncertainty isn’t only about what CBD does. It’s also about whether the bottle contains what it says.
Postpartum: worth taking seriously
The reasons new mothers reach for CBD are real. Pain after birth, exhaustion, anxiety, the emotional weight of the first weeks — and a strong desire to avoid medication while nursing.
But postpartum depression is not a symptom to manage with a supplement. It’s a common, serious and highly treatable condition, and delaying proper treatment can allow it to become worse.
If you’re struggling with persistent low mood, anxiety, inability to sleep even when the baby sleeps, frightening intrusive thoughts or feeling disconnected from your baby, speak to a midwife, health visitor or GP promptly. If you feel you might harm yourself or your baby, feel unable to stay safe, or experience hallucinations, severe confusion or unusual beliefs, seek urgent help.
Worth knowing: several antidepressants have been studied extensively in breastfeeding and are considered compatible with it. The choice isn’t between medication and nursing.
If you’re not breastfeeding
Different question entirely. Once you’ve stopped nursing, the specific concern here no longer applies, and CBD carries the same considerations it does for any adult — our guide to CBD and what the research actually shows covers those.
The one thing worth checking is drug interactions, particularly if you’re taking anything prescribed after the birth. CBD can also cause drowsiness, which is worth considering while caring for a newborn.
If you’ve already used it
Don’t panic, and do mention it. Absence of safety data doesn’t mean harm has occurred, and the concerning animal findings involved doses far beyond what a retail product delivers. Your midwife, health visitor or GP has heard it before and can’t help if they don’t know.
Where this leaves things
CBD isn’t inherently dangerous, and prescription CBD has genuine medical value in epilepsy. Plenty of adults take it without difficulty.
The problem is specific: CBD transfers into breast milk, nobody has established what that exposure means for an infant, and there’s no reliable waiting period that can be used to avoid it. On top of that, a retail product may not contain what it claims. Those are questions worth having answers to before deciding, and at the moment we don’t have them.
Nothing here is medical advice. If you’re breastfeeding and considering CBD, or already using it, speak to a clinician who knows your circumstances.
See also our guide to CBD during pregnancy, or browse Women’s Health.
References
- National Library of Medicine. Cannabis. Drugs and Lactation Database (LactMed). NCBI Bookshelf
- National Library of Medicine. Cannabidiol. Drugs and Lactation Database (LactMed). NCBI Bookshelf
- Gidal BE, Vandrey R, Wallin C, et al. Product labeling accuracy and contamination analysis of commercially available cannabidiol product samples. Frontiers in Pharmacology. 2024;15:1335441. doi:10.3389/fphar.2024.1335441 (sponsored by Jazz Pharmaceuticals)
- US Food and Drug Administration. What you should know about using cannabis, including CBD, when pregnant or breastfeeding. FDA Consumer Update
About this article
Substantially rewritten in August 2026, incorporating our earlier reporting on CBD for new mothers. This update explains why no reliable waiting period has been established for CBD, unlike alcohol, sets out what LactMed and the FDA say, and addresses postpartum depression directly rather than as a symptom to manage. With earlier reporting by Lisa Rennie.
