I wonder why Bactrim is not compatible. We give bactrim (sulfamethoxazole/trimethoprim) to children with ear infections. I don't have my copy of Hale or Briggs handy, but why wouldn't we use a medication which we would prescribe to this 3-year-old if he had an infection? Another example of not using common sense in prescribing meds to nursing moms, IMO. Alicia. [log in to unmask]