Breastfeeding Basics From a Reproductive Psychiatrist
- Jamie Sorenson
- Dec 12, 2025
- 2 min read
A relative infant dose of less than 10% is typically regarded as acceptable when it comes to breastfeeding while on medication (Please speak with your prescriber before breastfeeding on any medication). This threshold is based on clinical guidelines that aim to ensure the safety of infants who are exposed to medications through breast milk. However, it is essential for breastfeeding mothers to monitor their babies after feeds, particularly while they are taking medications.
Newborns, in particular, are more sensitive to the effects of medications that may be present in breast milk compared to older infants. This increased sensitivity is due to their developing systems and lower body weight, which can amplify the effects of any substances they ingest. If a mother feels particularly anxious about the potential effects of a medication, an effective strategy is to pump and store breast milk for later use when the baby is older and chunkier.
However, in most cases, this precaution is not necessary, as many medications are considered safe for breastfeeding mothers. In today’s digital age, it is easy to access reliable information regarding breastfeeding and medications. A quick search using the terms “lactmed and the medication” on Google will lead to a valuable resource provided by the National Institutes of Health (NIH). This resource offers detailed insights into the safety profiles of various medications in relation to breastfeeding, helping mothers make informed decisions. I would do this instead of Chat GPT. :-)
One medication that raises some concern is Zuranolone, primarily because it is very sedating and is the only oral FDA approved medication for Postpartum Depression. While it can be worrisome to consider its presence in breast milk and the potential impact on infants, the available data tends to be reassuring. Nevertheless, it’s understandable to feel more apprehensive about a newborn being exposed to such a medication than an older baby, who may better tolerate its effects.
Additionally, it is important to note that some medications have the potential to decrease milk volume or production for the day. This reduction in milk supply can lead to a fussy baby, which may be misattributed either to the medication exposure when its in fact a response to reduced supply.
In any case, it is crucial to remember that supplementing with formula is always a viable option if breastfeeding proves challenging. Formula can be an excellent alternative for ensuring that a baby receives adequate nutrition safely. This perspective holds true despite the often contentious politics surrounding infant feeding practices and formula use. Prioritizing the health and well-being of both mother and baby should always be the primary focus.
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Taking new patients in FL, GA, CO, and TN. All patients 12 years and older are welcome.
Disclaimer: Posts are for education and entertainment only. No medical advice given. This information is for general knowledge and not meant to diagnose or treat any conditions.
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