Drug information provided by: Merative, Micromedex®

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. Birth defects may occur if the father is using this medicine when his sexual partner becomes pregnant. If a pregnancy occurs while you are using this medicine, tell your doctor right away.

Do not use the following medicines while you are using Zepatier®: cyclosporine (Gengraf®, Neoral®, Sandimmune®), rifampin (Rifadin®, Rimactane®), St. John's wort, medicine to treat HIV infection (including atazanavir, darunavir, efavirenz, lopinavir, saquinavir, tipranavir, Invirase®, Kaletra®, Reyataz®, Sustiva®), or medicine to treat seizures (including carbamazepine, phenytoin, Dilantin®, Tegretol®).

Check with your doctor right away if you are weak or tired, have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, vomiting, or yellow eyes or skin. These could be symptoms of a serious liver problem.

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 or vitamin supplements.