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  • Sandra

    Bactrim ( sulfamethoxazole/trimethoprim) is rated an L3-limited data-probably compatible. The amount that transfers into breast milk is 2-3% of the sulfamethoxazole and 4-9% of the trimethoprim. We think it is probably ok in infants older than 1 month of age as long as the jaundice has resolved and they do not have G6PD deficiency. Monitor for vomiting, diarrhea, rash, thrush, and yellowing of skin and eyes.

    Sandra Lovato R.N.
    InfantRisk Center

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  • poohheart
    started a topic Sulfamethoxazole-trimethoprim


    I have been prescribed Sulfamethoxazole 800mg-Trimethoprim160mg and directed to take 1 tablet 2 times a day. I am exclusively breastfeeding my baby who is a little over 2 months of age. He was born a few weeks prematurely & had jaundice when he was born which required 24hrs of being under the light. Is this drug safe for me to take now while breastfeeding my son. If so how much of it would pass on to him & would there be any side effects for him?