what are the effects of Amitase on IBS or bacterial overgrowth?

I have been dx with IBS and had an abnormal breath test indicating bacterial overgrowth. I have tried nortriptaline but experienced side effect of wt gain. I currently am taking Riboxin. Other symptoms include abdominal pain, bloating increased flatulence, 3-4 bowel movements (formed) a day, occasional mucous and then occasional constipation.

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