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 low milk supply.
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:
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 Batak people of Indonesia as a galactogogue for hundreds of years.
- fennel (Foeniculum vulgare)
- milk thistle (Silybum marianum) In 2010 the European Food Safety Authority considered and rejected a claim for a silybum claim as a galactagogue because the evidence was deemed insufficient.
- 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. doi:10.1177/089033440201800311. PMID 12192964.
- Merriam-Webster: galactogogue
- Forinash AB, Yancey AM, Barnes KN, Myles TD (2012). "The use of galactogogues in the breastfeeding mother". Ann Pharmacother. 46 (10): 1392–404. doi:10.1345/aph.1R167. PMID 23012383.
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- Osadchy A, Moretti ME, Koren G (2012). "Effect of domperidone on insufficient lactation in puerperal women: a systematic review and meta-analysis of randomized controlled trials". Obstet Gynecol Int. 2012: 642893. doi:10.1155/2012/642893. PMC 3306907. PMID 22461793.
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- Forinash AB, Yancey AM, Barnes KN, Myles TD (October 2012). "The use of galactogogues in the breastfeeding mother". Ann Pharmacother. 46 (10): 1392–404. doi:10.1345/aph.1R167. PMID 23012383.
- Donovan TJ, Buchanan K (2012). "Medications for increasing milk supply in mothers expressing breastmilk for their preterm hospitalised infants". Cochrane Database Syst Rev. 3: CD005544. doi:10.1002/14651858.CD005544.pub2. PMID 22419310.
- Da Silva, O. P.; Knoppert, D. C. (2004). "Domperidone for lactating women". Canadian Medical Association Journal. 171 (7): 725–726. doi:10.1503/cmaj.1041054. PMC 517853. PMID 15451832.
- 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. doi:10.18433/j3ds3r.
- 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.
- Damanik R, Wahlqvist ML, Wattanapenpaiboon N (2006). "Lactagogue effects of Torbangun, a Bataknese traditional cuisine". Asia Pac J Clin Nutr. 15 (2): 267–74. PMID 16672214.
- 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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