Can you take pemirolast 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.
Pemirolast is no longer marketed in the United States. Although no published data exist on the use of pemirolast during lactation, maternal milk levels are likely to be very low after the use eye drops. To substantially diminish the amount of drug that reaches the breastmilk after using eye drops, place pressure over the tear duct by the corner of the eye for 1 minute or more, then remove the excess solution with an absorbent tissue.
Quoted from Pemirolast — Drugs and Lactation Database (LactMed®), National Institute of Child Health and Human Development, revised September 15, 2025.
How much pemirolast gets into breastmilk
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.
What has been seen in breastfed infants
Relevant published information was not found as of the revision date.
Effects on milk supply
Relevant published information was not found as of the revision date.
Frequently asked questions
Can you take pemirolast while breastfeeding?
Pemirolast is no longer marketed in the United States. 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.
Does pemirolast pass into breastmilk?
LactMed's measured drug levels for pemirolast are quoted in full on this page, under "How much gets into breastmilk".
Do I need to pump and dump after taking pemirolast?
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 pemirolast
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.