It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Using this medicine together with ribavirin while you are pregnant can harm your unborn baby. These medicines may also cause birth defects if the father is using it when his sexual partner becomes pregnant. If a pregnancy occurs while you are using these medicines and for 6 months after your treatment ends, tell your doctor right away.
Using this medicine with amiodarone may cause bradycardia. Check with your doctor right away if you have chest pain or discomfort, lightheadedness, dizziness, or fainting, shortness of breath, slow or uneven heartbeat, or unusual tiredness.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (eg, St. John's wort) or vitamin supplements.