I hope people respond to this since I was about to post a question about SIBO also... But why suspected SIBO and not diagnostic of SIBO?
I wonder if it is not better to first change diet before taking medication and seeing what happens with SIBO symptoms. I removed all wheat products almost 2 years ago and, aside from losing a lot of weight, I also removed most of my digestive issues (pouchitis) and allergic reactions, including basophilia (high levels of the immunoglobins (white blood cells) responsible for attending to what causes allergic reactions: Basophiles.
I've found that Apples are wonderful probiotics. I also prepare homemade probiotics in the form of Kimchi and sauerkraut (fermented vegetables are probiotics). Supposedly the problem with SIBO is that your small intestine becomes over-run with bad bacteria because you don't have enough good bacteria... and refined carbs are the #1 food for bad bacteria.
Ross