While you are taking rifaximin, it may cause a reddish discolouration of the urine. This is quite normal. If you are using oral contraceptives take additional precautions while taking rifaximin. Oral contraceptives may not work as well when you are taking this medicine and/or when you have diarrhea. Rifaximin does not normally affect the ability to drive and use machines, but may cause dizziness in some patients. If you feel dizzy you should not drive or operate machinery. if you are pregnant or breast feeding speak to your doctor before starting the drug. To make sure rifaximin is safe for you, tell your doctor if you have:
- liver disease
- diarrhea with a fever
- watery or bloody diarrhea
Treatment with any antibiotic including rifaximin may cause severe diarrhea. You should stop taking it and contact your doctor immediately. Diarrhea may even occur few months after the drug has been stopped.