In plain words
A dopamine antagonist is a class of medication that blocks dopamine receptors in the body. Some are used for nausea, and one, domperidone, is sometimes used off-label for milk supply. It is not approved for that use in the United States. Some countries allow it for milk supply with a prescription. Heart rhythm problems are a known concern with this medication, and the FDA has warned about them. The evidence that it helps milk supply is limited. A provider can go over the risks, the evidence, and other options with a mother who is interested in medication for milk supply. Her provider knows her health history and can answer the question directly.
The deeper version
Dopamine antagonists block D2 receptors in the lactotroph pathway, removing tonic inhibition and raising . Domperidone, which does not readily cross the blood-brain barrier, is the best-known agent used off-label as a . The FDA issued warnings in 2004 about serious cardiac arrhythmias and sudden death associated with domperidone, and it is not FDA-approved for lactation in the United States. The Academy of Breastfeeding Medicine Clinical Protocol 9 on galactagogues describes the limited and mixed trial evidence for dopamine antagonists and recommends weighing cardiac risk. Controversy centers on whether the modest milk-volume effect in trials is clinically meaningful and whether observational reports of cardiac events justify restriction.
Where it comes up
- Lactation foods and galactagogues: what's knownFeeding Your Baby
- Low milk supply: real, perceived, and what helpsFeeding Your Baby
- Relactation and induced lactationFeeding Your Baby
What mothers here say about dopamine antagonist
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Sources
- Academy of Breastfeeding Medicine — Clinical Protocol 9: Use of Galactogogues in Initiating or Augmenting Maternal Milk Supply
- US Food and Drug Administration — Public health advisory on domperidone and serious cardiac events, 2004