Just an FYI regarding ways to keep Xifaxin costs down. It's MUCH cheaper to get the 550mg tabs than the 200mg. The retail price on 60? 200mg was like $1800 or something. With my insurance, it's $10 for a supply of the 500mg, but was $60 if I ordered the 200mg. Also, ask your GI for samples. He gave me about 20 boxes worth last time I went (that's 40 pills I think).