Can you take ranitidine while breastfeeding?
What LactMed says
The National Library of Medicine’s own summary, quoted in full. We do not write a verdict of our own on this question, and we do not compress theirs into a label.
Although interpatient variability exists, the dose of ranitidine in breastmilk is less than the dose used in newborn infants. Ranitidine itself is not a concern during breastfeeding, but it can break down to a toxic compound if not formulated and stored properly. An alternate drug might be preferred.
Quoted from Ranitidine — Drugs and Lactation Database (LactMed®), National Institute of Child Health and Human Development, revised December 15, 2025.
What LactMed would consider instead
LactMed ends this record by naming the drugs it would consider in place of ranitidine. Whether any of them fits depends on what you are treating — this is the database’s list, not a recommendation from us.
How much ranitidine gets into breastmilk
Maternal Levels. Six women with established lactation who were 6 to 10 days postpartum were given a single dose of 150 mg of ranitidine orally. Average milk levels were 1.28, 1.42 and 1.02 mg/L at 2, 4 and 8 hours, respectively, after the dose; however, there was great interpatient variability in both peak levels and the time of the peak.
After 5 oral doses of ranitidine 150 mg every 12 hours in a 54-day postpartum woman, the highest measured milk level occurred 5.5 hours after the 5th dose and was 2.6 mg/L. The estimated half-life in milk was 2.9 hours.
Using the average peak milk level data from these 2 papers, an exclusively breastfed infant would receive an estimated maximum of 300 mcg/kg daily with a maternal dosage of 150 mg daily. This dosage is 20% of the dosage used intravenously in newborn infants for stress ulcer prophylaxis.
Infant Levels. Relevant published information was not found as of the revision date.
What has been seen in breastfed infants
One 54-day-old breastfed infant had no observable adverse effects after maternal ingestion of ranitidine 150 mg every 12 hours for 2 days.
Effects on milk supply
Histamine H2-receptor blockade is known to stimulate prolactin secretion. Ranitidine in intravenous doses over 100 mg or during long-term oral use have increased serum prolactin in some studies, and rare cases of gynecomastia have been reported. The prolactin level in a mother with established lactation may not affect her ability to breastfeed.
Frequently asked questions
Can you take ranitidine while breastfeeding?
Although interpatient variability exists, the dose of ranitidine in breastmilk is less than the dose used in newborn infants. The full record is quoted on this page, and the decision is one to make with the person who prescribed it — LactMed itself states it is not a substitute for professional judgement.
What can I take instead of ranitidine while breastfeeding?
LactMed lists Antacids, Cimetidine, Famotidine, Omeprazole, Pantoprazole, Sucralfate as alternate drugs to consider. That is the database's own list for this drug — whether any of them suits you depends on what you are treating.
Does ranitidine pass into breastmilk?
LactMed's measured drug levels for ranitidine are quoted in full on this page, under "How much gets into breastmilk".
Do I need to pump and dump after taking ranitidine?
LactMed does not frame its records that way — it reports measured drug levels in milk and what has been observed in breastfed infants, which is what this page quotes. "Pump and dump" advice for a specific drug and dose should come from your clinician or a pharmacist, not from a general rule.
More on ranitidine
LactMed states that the information it presents is not a substitute for professional judgement, and that you should consult your healthcare provider for breastfeeding advice related to your particular situation. Nothing on this page is medical advice.