Can you take gentian violet 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.
Gentian violet (crystal violet) was used in the past to treat oral and nipple thrush during breastfeeding. Gentian violet is potentially toxic to the mucous membranes, causing oral ulceration with partial airway obstruction in one case, and potentially tattooing the skin. It can also interact with DNA, is carcinogenic and mutagenic in animals, and occasionally causes allergic sensitization, with cross-reactions to other triphenylmethane dyes. Its use has been severely curtailed by authorities in Australia, Canada, England and France. It is also very messy, staining skin and clothing. A 2001 survey of the members of the Academy of Breastfeeding Medicine (ABM) found that gentian violet is rarely (1 to 2% of respondents) used by breastfeeding experts for initial treatment of oral thrush and is very infrequently (3 to 4% of respondents) used for recurrent or persistent thrush. ABM guidelines for treating Candida infection of the nipples state that an aqueous solution of gentian violet of less than 0.5% can be used for no more than 7 days on the nipple. However, safer alternatives for treating thrush are available.
Quoted from Gentian Violet — Drugs and Lactation Database (LactMed®), National Institute of Child Health and Human Development, revised August 15, 2024.
What LactMed would consider instead
LactMed ends this record by naming the drugs it would consider in place of gentian violet. Whether any of them fits depends on what you are treating — this is the database’s list, not a recommendation from us.
What has been seen in breastfed infants
Gentian violet has caused oral ulceration in breastfed infants treated with 1% or 2% solution applied to the mouth and tongue for thrush.
A 2-week-old exclusively breastfed infant was treated for oral thrush with aqueous 1% gentian violet solution twice daily for 1 day. The parents discontinued it because they thought it was causing airway discomfort. After 2 days, it was restarted at 4 times a day. Cough and difficulty feeding developed after 1 day and the infant was then admitted to the hospital, ultimately requiring intubation.
Effects on milk supply
Relevant published information was not found as of the revision date.
Frequently asked questions
Can you take gentian violet while breastfeeding?
Gentian violet (crystal violet) was used in the past to treat oral and nipple thrush during breastfeeding. 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 gentian violet while breastfeeding?
LactMed lists Clotrimazole, Fluconazole, Miconazole, Nystatin 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.
Do I need to pump and dump after taking gentian violet?
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 gentian violet
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.