Very small amounts of mefenamic acid are excreted into breastmilk. AAP classifies drug as compatible with breastfeeding. NOTE: I am willing to answer medication questions (if I can - I don't have all the answers - and if I am not Nomail), but I will not do so if I see that someone is specifically asking for Dr. Newman's or Dr. Hale's advice. People are still asking for Dr. Hale's advice even though he notified Lactnet that he will be Nomail for the next several months. If I see that Dr. Newman has not been able to answer a question, or that I might have something more to add, I will do my best. I would also appreciate it if you would not use my name in your request (unless you are asking me a question by personal contact) as I will monitor the questions when I am online with Lactnet and reply when I see a need. Thanks.