A galactagogue, or galactogogue, (from Greek: γάλα [γαλακτ-], milk, + ἀγωγός, leading) is a substance that promotes lactation in humans and other animals. It may be synthetic, plant-derived, or endogenous. They may be used to treat lactation failure.
Synthetic galactagogues such as domperidone and metoclopramide interact with the dopamine system in such a way to increase the production of prolactin; specifically, by blocking the D2 receptor. There is some evidence to suggest that mothers who are unable to meet their infants' breastfeeding needs may benefit from galactogogues. Galactagogues may be considered when non-pharmacologic interventions are found to be insufficient. For example, domperidone may be an option for mothers of preterm babies who at over 14 days from delivery and after full lactation support still have difficulty expressing breast milk in sufficient quantity for their child's needs.
Domperidone (like metoclopramide, a D2 receptor antagonist) is not approved for enhanced lactation in the USA. By contrast, Australian guidelines consider domperidone to be the preferred galactagogue when non-pharmacological approaches have proved insufficient. Unlike metoclopramide, domperidone does not cross the blood-brain barrier and does not tend to have adverse effects such as drowsiness or depression.
Other drugs which may increase lactation include:
- Antipsychotics such as risperidone, chlorpromazine and sulpiride, due to their ability to block the D2 receptor
- Certain hormones such as oxytocin, growth hormone (GH), thyrotropin-releasing hormone (TRH), and thyroid-stimulating hormone (TSH)
Herbals and foods used as galactogogues have little or no scientific evidence of efficacy and the identity and purity of herbals are concerns because of inadequate testing requirements. The herbals most commonly cited as galactagogues are:
- shatavari (Asparagus racemosus)
- fenugreek (Trigonella foenumgraecum)
- torbangun (Coleus amboinicus), which has been used by the Bataknese people of Indonesia as a galactogogue for hundreds of years.
- fennel (Foeniculum vulgare)
- milk thistle (Silybum marianum)
- chasteberry (Vitex agnus castus)
- goat’s rue (Galega officinalis)
Other herbals that have been claimed to be galactagogues include:
- blessed thistle
- red raspberry leaf
- marshmallow (althaea) root
- Moringa 
Herbal galactogogues are divided into those believed to also have a sedating action on the nursing infant due to their volatile constituents, which can be carried through the breast milk itself, and those seen as promoting milk production without directly affecting the content. This often seems to be linked to anethol content.
- Gabay, M. P. (2002). "Galactogogues: Medications that induce lactation". Journal of Human Lactation. 18 (3): 274–279. PMID 12192964.
- Merriam-Webster: galactogogue
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- The Academy Of Breastfeeding Medici (2011). "ABM Clinical Protocol #9: Use of Galactogogues in Initiating or Augmenting the Rate of Maternal Milk Secretion (First Revision January 2011)". Breastfeeding Medicine. 6 (1): 41–49. doi:10.1089/bfm.2011.9998. PMID 21332371.
- Zuppa, Antonio; Paola Sindico; Claudia Orchi; Chiara Carducci; Valentina Cardiello; Costantino Romagnoli; Piero Catenazzi (2010). "Safety and Efficacy of Galactogogues: Substances that Induce, Maintain and Increase Breast Milk Production". Journal of Pharmacy & Pharmaceutical Sciences. 13 (2): 162–174.
- Anderson, P. O. (31 December 2012). "The Galactogogue Bandwagon". Journal of Human Lactation. 29 (1): 7–10. doi:10.1177/0890334412469300. PMID 23277457.
- Mortel M, Mehta SD (May 2013). "Systematic review of the efficacy of herbal galactogogues". J Hum Lact. 29 (2): 154–62. doi:10.1177/0890334413477243. PMID 23468043.
- Chantry, Caroline J.; Howard, Cynthia R; Montgomery, Anne; Wight, Nancy (2004). "Use of galactogogues in initiating or augmenting maternal milk supply" (PDF). ABM protocols, Protocol#9. The Academy Of Breastfeeding Medicine. Archived from the original (PDF) on 28 June 2007.
Supported in part by a grant from the Maternal and Child Health Bureau, Department of Health and Human Services.
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- Nice, F. J. (19 May 2011). "Common Herbs and Foods Used as Galactogogues". ICAN: Infant, Child, & Adolescent Nutrition. 3 (3): 129–132. doi:10.1177/1941406411406118.
- McIntyre, Anne (1992). The herbal for mother and child. Shaftesbury: Element. ISBN 1-85230-244-5.
- Diana West and L. Marasco, The Breastfeeding Mother's Guide to Making More Milk. New York: McGraw-Hill, 2008.
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