Psychiatric Medication While BreastfeedingWhat the Evidence Says

If you’re pregnant, recently gave birth, or nursing, and you’re struggling with depression or anxiety, the question of psychiatric medication while breastfeeding can feel impossible. Many parents worry that taking medication means choosing between their own health and their baby’s. The evidence is more reassuring than many people expect. This guide explains what’s known about antidepressants in breast milk, how psychiatrists use resources like LactMed, what untreated depression means for families, and how to make a decision you feel good about.

Can You Take Psychiatric Medication While Breastfeeding?

Many people can take psychiatric medication while breastfeeding, because several commonly used medications pass into breast milk in very small amounts and have been studied in nursing infants. The decision depends on the specific medication, the dose, your baby’s age and health, and how severe your symptoms are.

Some medications have more data than others. According to LactMed, the National Library of Medicine’s drugs and lactation database, amounts of sertraline ingested by breastfed infants are small and usually not detected in infant blood, and most authoritative reviewers consider it a preferred antidepressant during breastfeeding. LactMed also notes that rarely, preterm infants may accumulate the drug, which is one reason your baby’s age and health matter.

Antidepressants and Breastfeeding: What the Research Shows

Research on antidepressants and breastfeeding shows that for some medications, especially sertraline, infant exposure through breast milk is very low. A review and meta-analysis of sertraline and breastfeeding found that of 167 available infant sertraline levels, 146, or 87.4%, were below the limit of detection. Of 150 infant levels of its active metabolite, 70% were below detection.

LactMed estimates that an exclusively breastfed infant would receive about 0.5% of the mother’s weight-adjusted sertraline dose. For escitalopram, LactMed notes that maternal doses up to 20 mg daily produce low levels in milk and that the medication is not a reason to stop breastfeeding, especially for infants older than two months, while advising monitoring for drowsiness, poor feeding, or poor weight gain.

Why Untreated Postpartum Depression Matters

Untreated postpartum depression matters because it affects the parent, the baby, and the whole family, so the risks of not treating have to be weighed alongside the risks of medication. In a CDC analysis of 2018 survey data, 13.2% of women with a recent live birth reported postpartum depressive symptoms. The same report notes that postpartum depression is associated with lower rates of breastfeeding initiation, poorer bonding, and a higher likelihood of developmental delays in infants.

That’s why many psychiatrists see treatment, including medication when appropriate, as supporting breastfeeding rather than threatening it. Feeling well enough to care for yourself and your baby is part of a healthy start.

The choice isn't medication versus a healthy baby. Untreated depression affects the whole family, too.

Choosing Postpartum Depression Medication While Nursing

Choosing postpartum depression medication while nursing involves weighing how well a medication has worked for you before, how much of it reaches breast milk, your baby’s age and health, and your own preferences. If a medication worked well during pregnancy, continuing it after birth is often reasonable, since switching can risk a relapse.

Options beyond medication matter too. Therapy, sleep protection, and practical support from a partner or family can all help, and for many parents a combination works best. Our overview of psychiatrists vs therapists explains who does what, and our guide to SSRIs vs SNRIs covers how common antidepressants differ.

Medication Safety for Nursing Mothers: Practical Steps

Medication safety for nursing mothers comes down to choosing well-studied options, using the lowest effective dose, watching the baby for changes, and keeping both the psychiatrist and pediatrician informed. These steps help.

1. Share your history. Tell your psychiatrist which medications have worked for you before, including during pregnancy.
2. Check the evidence. Ask how much of the medication reaches breast milk, using resources such as LactMed.
3. Start low and adjust. Use the lowest dose that controls symptoms, adjusting as needed.
4. Watch your baby. Note sleepiness, feeding, weight gain, and fussiness, and report changes.
5. Keep everyone informed. Make sure your pediatrician and obstetric provider know your medications.

Tell your pediatrician about any medication you take. If your baby was born early, has health problems, or is very young, extra caution and closer monitoring may be recommended.

When to Get Help

Get help if low mood, anxiety, intrusive thoughts, or trouble sleeping even when the baby sleeps last more than two weeks after birth or make it hard to care for yourself or your baby. Don’t stop a psychiatric medication suddenly because you’ve started breastfeeding; talk it through first, since abrupt changes can cause discontinuation symptoms or relapse.

Seek emergency care right away for thoughts of harming yourself or your baby, confusion, or seeing or hearing things others don’t, which can be signs of postpartum psychosis. Call or text 988 in the US, or call 911. For ongoing care, a comprehensive psychiatric evaluation can help you weigh your options, and our walkthrough of how telepsychiatry works explains video visits, which can be easier with a newborn.