Let's take a minute to talk about your medication. This is Xifaxan, it is an antibiotic that can be used to treat diarrhea caused by certain bacteria. It has other uses too, like treating irritable bowel syndrome and reducing complications from a damaged liver. You should take Xifaxan exactly as it is prescribed by your doctor. Your doses can be taken with or without food. This medicine is usually tolerated well but some side effects can occur. The most common side effects are headache, nausea, fatigue and dizziness. Do not do activities that require you to be alert, like driving, until you know how it affects you. Some patients might get swelling of the feet or ankles. Xifaxan can interact with other medicines. You should talk to your doctor or pharmacist before taking any other medicines. Women should talk to their doctors before becoming pregnant or breastfeeding. For best results, do not skip doses and let you doctor know if your symptoms worsen or do not improve while taking Xifaxan.