Tranexamic Acid use while Breastfeeding
Drugs containing Tranexamic Acid: Lysteda, Cyklokapron
Tranexamic Acid Levels and Effects while Breastfeeding
Summary of Use during Lactation
Amounts of tranexamic acid in breastmilk appear to be low. Although an international consensus panel recommended against using tranexamic acid during breastfeeding, a subsequent controlled study found no adverse outcomes among breastfed infants whose mothers took tranexamic acid in dosages up to 4 grams daily during breastfeeding. If tranexamic acid is required by a mother, it is not a reason to discontinue breastfeeding; however, until more data become available, medical supervision and follow-up of the breastfed infant is recommended.
Maternal Levels. Unpublished data from the manufacturer indicates that the concentration of tranexamic acid in breastmilk is 1% of the peak serum concentration 1 hour after the last dose of a 2-day treatment course. Further details of the study have not been published. Infant Levels. Relevant published information was not found as of the revision date.
Effects in Breastfed Infants
Twenty-one mothers who took tranexamic acid during breastfeeding were compared to 42 mothers who took amoxicillin during breastfeeding. In the study population, the tranexamic acid dosage ranged between 1.5 and 4 grams daily at an average of 4.2 months of age and 81% exclusively breastfed their infants. The average time of follow-up of the infants of study mothers was 35.7 months of age. No statistically significant difference were found between the study and control groups in possible drug side effects, neurological development or general health.
Effects on Lactation and Breastmilk
Relevant published information was not found as of the revision date.
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2. Gilad O, Merlob P, Stahl B, Klinger G. Outcome following tranexamic acid exposure during breastfeeding. Breastfeed Med. 2014. PMID: 25025926
3. Verstraete M. Clinical application of inhibitors of fibrinolysis. Drugs. 1985;29:236-61. PMID: 2580684
Tranexamic Acid Identification
CAS Registry Number
LactMed Record Number
Last Revision Date
Information presented in this database is not meant as a substitute for professional judgment. You should consult your healthcare provider for breastfeeding advice related to your particular situation. The U.S. government does not warrant or assume any liability or responsibility for the accuracy or completeness of the information on this Site.