In the spirit of Surfboar and others I have decided to keep on online log of my first attempt to treat my IBS with antibiotics.I will be taking 2 Xifaxan tablets, three times a day. That is, 400 mg. t.i.d. There was some research showing that symptom relief was dose dependent and higher doses yielded greater relief.I am 50 years old. I've had my IBS problems prior to being a teen-ager. I do remember getting serious food poisoning when I was 9 or 10. I am not sure whether that food poisoning was what Pimentel calls the "heralding event" of my IBS or not. The symptom that has bothered me most for more than 20 years is belching, AKA burping or eructation. I know that this is not a very common problem and few people on this board view it as their pimary complaint.More than 10 years ago I tried Elaine Gottschall's Specific Carbohydrate Diet. It represented a radical shift in my near-vegetarian dietary habits. It did not help me. But it forced me to increase my meat consumption. It then got me experimenting. I found that if I eliminated almost all my carbohydrates, my lifelong diarrhea was eliminated (pun intended) almost completely.This was good. But the problem was that I had never identified diarrhea as my primary sympton. However, it nice to no longer have 10 BMs a day and it was nice to no longer have mucus in my stool. Nevertheless, my belching continued. Also, when my symptoms were really bad I get abdominal distension as well.More than a month ago I read short news item in Prevention magazine about Rifaximin (Xifaxan) being helpful for a number of digestive ailments. This got me to do some research and eventually to read Pimentel's book and look at some of his research.Much of his theory is similar to Elaine Gottschall's, namely that undigested or partially digested carbohydrates in the small intestine serve to feed a bacterial overgrowth there. My initial reaction was scepticism because I had followed Gottschall's diet rigorously for more than a month with no benefit. However, I have seen patients' accounts on the internet saying that Pimentel told them that the Gottschall diet still requires too much food for the small intestine's bacteria.What convinced me to give Pimentel's protocol a try is that he, unlike the other gastroenterologists I have had contact with, does not diminish the significance of distension, eructation, and flatulence. If I could rid myself of these gaseous problems, I wouldn't care if I still had diarrhea, where the latter is defined as 4 or more BMs a day. Pimentel also taught me a few things that I did not get from Gottschall. First, Pimentel suggests that there may be motility disorders in the small intestine of an IBS sufferer and that this can be addressed with erythromycin or Zelnorm. Second, Pimentel suggests using antibiotics as the first means of removing bacteria from the small intestine. Third, Pimentel taught me that the elemental diet is available over the counter. From reading Gottschall, I had the impression that one could only be on the elemental diet by using a feeding tube.So I have embarked on my journey this morning by swallowing my first two Xifaxan tablets.I will have my first visit with a new gastroenterologist the first week of October. He has said he does the Quintron breath test. I don't know how familiar he is with Pimentel's research.My desired outcome is that in the next 10 days my burping and all digestive gas is reduced to normal levels. I would then see if the GI doc would still want to do the breath test. I would also ask him to put me on erythromycin or Zelnorm to maintain a health cleansing wave.If my course of Xifaxan does not alleviate my symptoms, I would very much like to get a breath test from the GI. If my breath test was positive for hydrogen-emitting bacteria in my small intestine, I would then seriously consider putting myself on the Vivonex Plus elimination diet.I am going to follow Pimentel's dietary guidelines while I am taking the Xifaxan. In one respect, I will deviate from the letter, but not the spirit of his recommendations. I bought a Yogourmet yogurt maker and I have made my own 24-hour cultured yogurt according to Gottschall's recommendations. She claims that the 24 hour culturing breaks down all the lactose in the milk. Pimentel recommends eating no yogurt but I take him to be referring to commercially available yogurt.Pimentel advises patients to eat food no more than three times per day. I will do this to enhance the effectiveness of my small intestine's cleansing wave.I hope that my experience with Xifaxan will be of some use to others considering adopting Pimentel's regimen.