Balsalazide use while Breastfeeding
Drugs containing Balsalazide: Colazal, Giazo
Balsalazide Levels and Effects while Breastfeeding
Summary of Use during Lactation
Although no information exists on the excretion of balsalazide into breastmilk, it is metabolized to the active drug mesalamine. A few cases of diarrhea have been reported in infants exposed to mesalamine, although the rate is not high. Most experts consider mesalamine derivatives to be safe during breastfeeding. If balsalazide is required by the mother, it is not a reason to discontinue breastfeeding, but observe breastfed infants for diarrhea.
Balsalazide is a prodrug that liberates the active drug, mesalamine (5-aminosalicylic acid; 5-ASA), in the gastrointestinal tract. Mesalamine is metabolized to N-acetyl-5-ASA which is inactive in treating inflammatory bowel disease, but its possible effects on the breastfed infant are unknown.
Maternal Levels. Relevant published information was not found as of the revision date.
Infant Levels. Relevant published information was not found as of the revision date.
Effects in Breastfed Infants
The active metabolite of balsalazide, mesalamine, was probably responsible for diarrhea in a 6-week-old whose diarrhea recurred 4 times after rechallenge of the mother 4 times during breastfeeding.
Diarrhea has also been reported anecdotally by some nursing mothers taking mesalamine, but a small controlled study reported only in abstract form found no higher rate of diarrhea in the breastfed infants of mothers taking mesalamine than in control infants.
Effects on Lactation and Breastmilk
Relevant published information was not found as of the revision date.
Alternate Drugs to Consider
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2. Nielsen OH, Maxwell C, Hendel J. IBD medications during pregnancy and lactation. Nat Rev Gastroenterol Hepatol. 2014;11:116-27. PMID: 23897285
3. Mahadevan U, Matro R. Care of the pregnant patient with inflammatory bowel disease. Obstet Gynecol. 2015;126:401-12. PMID: 26241432
4. Nelis GF. Diarrhoea due to 5-aminosalicylic acid in breast milk. Lancet. 1989;333:383. Letter. PMID: 2563532
5. Ito S, Blajchman A, Stephenson M, Eliopoulos C, Koren G. Prospective follow-up of adverse reactions in breast-fed infants exposed to maternal medication. Am J Obstet Gynecol. 1993;168:1393-9. PMID: 8498418
6. Moretti ME, Spiczynski Y, Hashemi G et al. Prospective follow-up of infants exposed to 5-aminosalicylic acid containing drugs through maternal milk. J Clin Pharmacol. 1998;38:867. Abstract.
CAS Registry Number
Anti-Inflammatory Agents, Non-Steroidal
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.