Experience with Pet Flora to treat diarrhea and vomiting?

[thbtbt]

Anyone ever try using a probiotic like Vitality Science Pet Flora  to help with diarrhea and vomiting? My kitty is a little stressed recently from a new cat being in the house and last night had a taste of a new cat food that didn't sit well with her. She has a sensitive stomach as it is, and without forcing her to fast all day or drag her to the vet (she's a handful), I want to pick up some probiotics to see if that will help her tonight. Anyone have experience doing this?