Ive seen a lot of moms posting about using this formula (or other brands that are similar) and I'm wondering if your pedi recommended it and your LO was truly "diagnosed" as having a lactose intolerance. Also, are you using the SS for healthy babies or just the SS? I tried the SS and didnt have the best results (more gassy and spit up than before), plus I didn't like that main ingredient was corn syrup (or a derivative of corn syrup) but I am not sure about the one for Healthy Babies. Anyone use that particular one?

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Re: Similac Sensitive Moms
I have a 7 week old baby girl and I never seen a baby that can spit up like mine, the doctor recommended SS, so I gave it a try, needless to say not only my daughter was spitting up twice more, she was also contipated, sometimes would take her 3days to poop, when i mentioned to the doctor he said that up to 5 days was normal, I got so upset that I went out and bought Soy formula, and let me tell u, its working wonders, she hasn't spit up like she used to and her poop is on a schedule now (2 to 3x a day). So maybe u should try soy, sometimes babies have intolerence to milk as well; I did that only because I have a 6 year old as well and her doctor had recommended that at the time when she was having terrible gas.
Good luck to you