What Foods and Drinks to Avoid While Taking Xifaxan

Key Takeaways

• Xifaxan acts locally in your digestive tract, meaning food choices directly impact how well your gut tolerates the treatment.
• If taking Xifaxan for SIBO or IBS-D, avoid high-FODMAP foods (like garlic, onions, and beans) that trigger severe gas, fermentation, and diarrhea.
• Do not take probiotics at the exact same time as your antibiotic dose, as Xifaxan will simply destroy the beneficial bacteria.
• Always consult your doctor before modifying your diet, especially if taking this medication to manage complications of liver disease.

Your Xifaxan Prescription

Xifaxan (rifaximin) is a highly specialized antibiotic. Unlike systemic antibiotics that absorb into your bloodstream to treat infections throughout the body, Xifaxan passes through your stomach and stays almost entirely inside your intestines.

Because it works directly within your gut, it is primarily prescribed to treat irritable bowel syndrome with diarrhea (IBS-D), Small Intestinal Bacterial Overgrowth (SIBO), and traveler's diarrhea. It is also used to reduce the risk of worsening brain function (hepatic encephalopathy) in adults with liver failure. Because it remains in your gut, your daily diet plays a massive role in your comfort during treatment.

Foods to Avoid While Taking Xifaxan

Unlike other antibiotics, Xifaxan does not have dangerous chemical interactions with specific foods. However, because it is actively altering your gut microbiome, eating foods that irritate your digestive tract can cause severe nausea, cramping, and bloating. Avoid or limit the following during your course:

• High-FODMAP Foods: If you are treating SIBO or IBS-D, high-FODMAP items ferment rapidly in the gut. Avoid onions, garlic, beans, lentils, apples, pears, and high-fructose corn syrup. Feeding the bacteria while trying to clear them out can worsen your symptoms.
• Artificial Sweeteners: Ingredients like sorbitol, mannitol, and xylitol (often found in sugar-free gums and candies) draw excess water into the bowel, worsening diarrhea.
• Greasy and Fried Foods: High-fat meals slow down digestion and put extra strain on a gut that is already undergoing microbial shifts, leading to painful cramps.
• Excessive Caffeine: Coffee and energy drinks stimulate bowel motility, which can amplify GI side effects while your gut bacteria are balancing out.

Should I Take a Probiotic While Taking Xifaxan?

This is one of the most common questions patients ask. The answer depends heavily on your specific diagnosis and timing.

If you take a standard probiotic supplement at the exact same time as your Xifaxan dose, the antibiotic will simply kill off the beneficial bacteria in the capsule, rendering it useless. However, your doctor may recommend taking probiotics to help rebuild your microbiome after you have fully finished your Xifaxan prescription.

The Separation Strategy: If your gastroenterologist explicitly instructs you to take a probiotic during your Xifaxan course, you must separate the doses. Take your probiotic at least 2 to 4 hours away from your Xifaxan dose to give the beneficial cultures a chance to survive.

Frequently Asked Questions

Should I take Xifaxan with food?

Xifaxan can be taken completely independently of meals—either on an empty stomach or with food. However, if you experience mild stomach upset after your dose, taking it alongside a light, easily digestible snack can help settle your stomach.

Can I drink alcohol while taking Xifaxan?

You should avoid alcohol during treatment. While alcohol does not directly stop Xifaxan from working, it severely irritates the lining of your digestive tract and can exacerbate gut inflammation. Furthermore, if you are taking Xifaxan for liver issues, alcohol is strictly toxic to the liver and must be completely avoided.

Does Xifaxan cause sun sensitivity?

No. Unlike tetracycline or fluoroquinolone antibiotics, Xifaxan does not typically cause photosensitivity disorders or increase your risk of severe sunburn, because it does not circulate widely in your skin tissue.

Always provide your healthcare team with a complete list of your current medications and gut health supplements before beginning a new therapy. For more details on managing chronic digestive symptoms, feel free to explore our dedicated medical section on Inflammatory Bowel Diseases.