L.Z.
I don't know what LLL suggests (they most likely don't suggest any brand of formula), but as someone who has had two breastfed AND formula-fed kids, I suggest good old traditional Enfamil Lipil, in the yellow container. This is assuming your daughter doesn't have any intolerance, digestion issues, etc. When both my girls went to formula after being breastfed, I found Enfamil to be easier for them to digest than Similac for some reason. Every baby is different and sometimes you have to try different brands. It sounds like you will resume breastfeeding after your medication has ended? Whatever your plans, I also suggest trying the formula on her before your two-week pump and dump period, just so you aren't scrambling around trying different kinds after your procedure. Good luck with everything!!