Following Breath testing, I was DX with Methane levels double the normal. Started Rifaxamin 8 days ago with a strict dietary plan. It is working somewhat but not as well as my doctor expected. Yesterday together with caution we added Neomycin 500mg twice a day. You must radically alter your diet to get success and be vigilant about the change. It's tough to do because of flimsy US food labeling. So you must do as much home cooking of fresh food as possible!! I can't say that enough. I'm having much better results only this way. I'll be happy to share my diet success with anyone out there. It is complicated but it works and it takes individual allergies, sensitivities into consideration because everyone's chemistry is different. It's helpful to monitor what you are eating at every meal so I use the free online app My Fitness Pal, recommended by my dietician. The app is easy to use, allows you to set personal goals for weight, water intake, exercise, and each element of food intake (calories, carbs, protein, fat, sugar, fiber, sodium). It's become my guide for this strict diet change for SIBO treatment. I'm not there yet, so it's a work in progress, but I am more hopeful than I was before. I've been dealing with this chronic life-changing disease since 2019, lost 20+ pounds that year, can't get my weight up to 100lbs yet, but the research is starting to improve and there is new info to help us each year. In the past 3 months, I've endured 5 different GI tests that have finally determined my underlying problem- SIBO! For years I was told I had IBS-C and IBS-D mix. That was false due to a lack of medical knowledge. Now the medical community is indicating that SIBO is underdiagnosed. Hang in there. Happy to share my successes and challenges if you ask.