U.S. flag

An official website of the United States government

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.

Drugs and Lactation Database (LactMed) [Internet]. Bethesda (MD): National Library of Medicine (US); 2006-.

Cover of Drugs and Lactation Database (LactMed)

Drugs and Lactation Database (LactMed) [Internet].

Show details


Last Revision: October 31, 2018.

Estimated reading time: 1 minute

CASRN: 22071-15-4

Chemical structure

Drug Levels and Effects

Summary of Use during Lactation

Although ketoprofen has low levels in breastmilk, one center reported that they had received reports of adverse renal and gastrointestinal side effects in breastfed infants whose mothers were taking ketoprofen. Other agents are preferred, especially while nursing a newborn or preterm infant.

Drug Levels

Maternal Levels. Eighteen women were given ketoprofen 100 mg every 12 hours (average 2.69 mg/kg daily) intravenously for 2 to 3 days postpartum. One to 4 milk samples were collected between the 3rd and 4th dose of ketoprofen. Of the 61 samples collected, ketoprofen was undetectable (<20 mcg/L) in 17 of the samples. The authors assumed a milk concentration of 20 mcg/L for undetectable samples and calculated an average milk concentration of 57 mcg/L (range 20 to 177 mcg/L). A fully breastfed infant would receive an average dosage of 8.5 mcg/kg daily or 0.31% of the maternal weight-adjusted dosage.[1]

Infant Levels. Relevant published information was not found as of the revision date.

Effects in Breastfed Infants

All adverse reactions in breastfed infants reported in France between January 1985 and June 2011 were compiled by a French pharmacovigilance center. Of 174 reports, ketoprofen was reported to cause adverse reactions in 8 infants and to be one of the drugs most often suspected in serious adverse reactions, such as esophageal ulceration, erosive gastritis, meningeal hemorrhage, and renal insufficiency.[2]

Effects on Lactation and Breastmilk

Relevant published information was not found as of the revision date.


Jacqz-Aigrain E, Serreau R, Boissinot C et al. Excretion of ketoprofen and nalbuphine in human milk during treatment of maternal pain after delivery. Ther Drug Monit. 2007;29:815-8. [PubMed: 18043481]
Soussan C, Gouraud A, Portolan G et al. Drug-induced adverse reactions via breastfeeding: a descriptive study in the French Pharmacovigilance Database. Eur J Clin Pharmacol. 2014;70:1361-6. [PubMed: 25183382]

Substance Identification

Substance Name


CAS Registry Number


Drug Class

  • Breast Feeding
  • Analgesic Agents
  • Nonsteroidal Antiinflammatory Agents

Disclaimer: 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.


Related information

Similar articles in PubMed

  • Review Ibuprofen[Drugs and Lactation Database (...]
    Review Ibuprofen
    . Drugs and Lactation Database (LactMed). 2006
  • Review Ioxaglate[Drugs and Lactation Database (...]
    Review Ioxaglate
    . Drugs and Lactation Database (LactMed). 2006
  • Review Mebendazole[Drugs and Lactation Database (...]
    Review Mebendazole
    . Drugs and Lactation Database (LactMed). 2006
  • Review Naproxen[Drugs and Lactation Database (...]
    Review Naproxen
    . Drugs and Lactation Database (LactMed). 2006
  • Review Flurbiprofen[Drugs and Lactation Database (...]
    Review Flurbiprofen
    . Drugs and Lactation Database (LactMed). 2006
See reviews...See all...

Recent Activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...