This is quoted from a post by amnesiac in the thread called, "My Hib (hemophilus influenzae B) experience"
"When you're giving a probiotic, it is important to not just give L. acidophilus. Look for a blend of microorganisms and children really need something with Bifidobacteria. I personally have used the powedered blends made by both Jarrow Formulas and Natures Way for my kids. Also of interest to you, aside from simply replacing flora, would be the article in the hib thread below demonstrating that drinking probiotic bacteria actually inhibits colonization of the respiratory tract by potentially pathogenic bacteria such as hib & Strep pneumo."
Probiotics can be purchased either in capsules or loose in a bottle. From what I understand, you just sprinkle it on whatever baby is eating or drinking. One mom just put it on her finger and let her baby suck it.....there are threads that talk about different methods.
Another good thread is "HIB-one more question..."
There is a site called......www.vaccinetruth.org.
There are pages and pages of information. You might find some info there on ingredients and derivatives....