please look up .dr. siebecker who has a blogg and a clinic in portland org. for digestive health especially study of S.I.B.O.
GO TO S.I.B.Oinfo.com to get in loop and receive newsletters and learn about dr. siebecker..it was from her news letter i got info about generic rifaxin not having same properties as the branded..which may or may not account for why it works for some and not others..
generics are not dangerous but just may not be as effective..who knew???almost everything we take with insurance is generic ,cheaper for insurance co and they work well enough for most things..i believe unless our drs insist insurance co will give generic..