Is domperidone safe to increase milk supply?

What does the evidence say about domperidone during pregnancy?

1. Domperidone is not approved for marketing in the United States by the FDA, though it's available in other countries for nausea, gastroparesis, and off-label use as a galactagogue; the FDA has warned that the quality of unapproved imported products can't be assured. 1
2. Health Canada warned about the potential risk of sudden cardiac death and ventricular arrhythmia associated with domperidone, particularly for patients over 60 or those taking more than 30 mg a day; one Dutch case-control study found the odds ratio for sudden cardiac death rose to 11.4 at doses above 30 mg daily, though the wide confidence interval reflects a small number of cases. 2
3. A meta-analysis found domperidone produced an average increase of 88 mL of milk a day, with a 95% confidence interval of 57 to 120 mL, in mothers of preterm infants, at an optimal studied dose of 30 mg daily for 7 days. 1
4. In an Australian survey of breastfeeding parents, domperidone had the highest perceived effectiveness rating among galactagogues at 3.3 out of 5, though this reflects self-reported perception rather than a measured change in milk volume. 3
5. Clinical reviews describe frequent and effective milk removal, not medication, as the mainstay of care for low milk supply, since ongoing production is governed by a local feedback mechanism tied to how thoroughly milk is removed from the breast. 4

How this changes over time

• In the early weeks postpartum, if low supply is a concern, the first step supported by the evidence is a hands-on check of positioning, latch, and feeding frequency, since good technique often closes the gap that a medication is unlikely to close on its own.
• If low supply continues despite good technique, this is when domperidone sometimes comes up in online communities, but it's not FDA-approved in the US and carries real cardiac risk at higher doses. Metoclopramide (Reglan) is a US-legal prescription option some providers consider instead, worth discussing directly with your provider.
• There's no reason to continue any galactagogue medication indefinitely without your provider reassessing whether it's still helping. If cardiac symptoms like a racing or irregular heartbeat, fainting, or palpitations show up at any point while trying a supply-boosting medication, stop and seek care.