@eileene7 my protocol included using the trio smart breath test which identified that I had methane dominant and the prescription protocol that was prescribed for me was the combination of xifaxin and Flagyl. This follows the protocol advised by Dr Mark Pimentel at Cedar Sinai who has done the preponderance of research regarding SIBO. I found reading his research helpful and the doctors that have worked with me also referred to his work. This journey has included much self education. A good team will be able to find the cause hopefully for you which will make this journey easier. I wish you the very best.