Gee, from what I was reading, it looked like there were doses ranging from 1 to 20 billion per day. Not sure where the 100 billion came from (that would be 10 to the 12th power). But, it is a big article, so it might have been in there and I didn't see it. But, specifically for recurrent C. difficile, it looked like the studies used 5-20 billion.
Marie, glad you are feeling better. I guess I am one of the lucky few and Flagyl does not make me feel funky, just that funky taste in my mouth (glass of wine, and I don't care!). But, I don't take it very often.
Jan
