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I just switched my 5mo old from breast to formula and he has diarrhea?

Has this happened to anyone else? Im not sure if he is allergic to the formula or if this is a normal transition stage when you switch over? He has no other signs of discomfort other than the diarrhea. Thank you for any advice.


Asked by jettsmom111 at 10:49 AM on May. 15, 2010 in Babies (0-12 months)

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Answers (8)
  • Wow. Rude people need to go back to bed and try it again! It's normal. It will take a few days or maybe even weeks for him/her to get used to it. That's the same reason I don't give my dog table scraps, a change in diet will upset their tummies.

    Answer by nakoal87 at 12:20 PM on May. 15, 2010

  • They don't digest as much of the formula as they do breast milk so I would think it's normal for his poops to change. See how long it lasts.


    Answer by maxswolfsuit at 10:53 AM on May. 15, 2010

  • Geez... it's totally normal. For a little one, any kind of change is going to cause some gastric upset. Don't stir up all these PRO BFer moms on here any more than you have to.... it's best just to let them lay dormant!! LOL!!!

    Answer by Anonymous at 11:06 AM on May. 15, 2010

  • Formula tends to be hard to digest and if you switched suddenly its going to cause a fair amount of discomfort. If trouble persists or gets worse you may have to switch formula to a gentler type or sometimes non-cow based. Watch for constipation too...formula can also be very constipating especially because of the iron and it doesn't have the natural laxative breastmilk has.

    If you switched because of meds, you may not have to. If you think you have supply issues that can also be corrected if interested. is one of the best resources for breastmilk and nursing info.

    Answer by amileegirl at 11:18 AM on May. 15, 2010

  • Some babies get diarrhea from the DHA/RHA supplement in the formula. "While many scientists doubt the benefits of manufactured DHA and ARA oils, little doubt exists that at least a subset of the infant population experiences severe side effects, including watery, explosive diarrhea, severe vomiting, and gastrointestinal distress serious complications in this vulnerable population. Manufactured DHA and ARA fatty acids are structurally different from those found naturally in breastmilk. This structural difference may be one of many possible reasons why some infants experience such severe side effects."
    Google formula DHA diarrhea for lots of info on this. You may want to consider trying a formula w/o DHA/RHA or go back to breastfeeding. Go ahead and call me the "breastfeeding police" if you want, but when a child is reacting poorly to formula it is something that ought to be considered.

    Answer by maggiemom2000 at 2:24 PM on May. 15, 2010

  • nakoaal87 no one was rude!

    Answer by amileegirl at 2:45 PM on May. 15, 2010

  • its normal...jsut don't let him get dehydrated and maybe try a gentle formula :)

    Answer by calliesmommie at 8:59 PM on May. 15, 2010

  • thank you for the answers it really helped!

    Answer by jettsmom111 at 1:21 PM on May. 17, 2010