xifaxan can help.ription xifaxan is a 2-week treatment that can provide you with 6 to 24 weeks of relief from your ibs-d symptoms. specifically, relief from diarrhea and abdominal pain associated with ibs-d. do not use xifaxan if you have a history of sensitivity to rifaximin, rifamycin antibiotic agents or any components of xifaxan. tell your doctor right away if your diarrhea worsens while taking xifaxan as this may be a sign of a serious or even fatal condition. tell your doctor if you have liver disease or are taking other medications because these may increase the amount of xifaxan in your body. tell your doctor if you are pregnant, plan on becoming pregnant, or are nursing. the most common side effects are nausea and an increase in liver enzymes. if you think you have ibs with diarrhea talk to your doctor about xifaxan. or if you're young or old.are if you run everyday, no matter who you are a heart attack can happen without warning. if you've had a heart attack, a bayer aspirin regimen can help