Once a child is shifted from inulin to rifaximin, can the child go back and use inulin again?

If a child’s protocol shifts from inulin to rifaximin because the inulin no longer helped control bacterial overgrowth, then shifting back to inulin is generally not be helpful. But if the change to rifaximin was done incorrectly and there still may be a chance the inulin will be effective, then yes, you can shift back to inulin.