It is very important that your doctor check the progress of you or your child at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. Blood tests may be needed to check for unwanted effects.
You should not use this medicine if you or your child are also receiving atazanavir, darunavir, fosamprenavir, ritonavir, saquinavir, tipranavir, Aptivus®, Fortovase®, Invirase®, Lexiva®, Norvir®, Prezista®, or Reyataz®. These medicines are used to treat human immunodeficiency virus (HIV) infections.
Liver problems may occur with this medicine. The risk for liver problems is increased if you drink alcoholic beverages on a regular basis. You should limit the amount of alcoholic beverages you drink while you are receiving this medicine. If you have any concerns about this, talk to your doctor.
Stop using this medicine and check with your doctor right away if you or your child have pain or tenderness in the upper stomach; pale stools; dark urine; loss of appetite; nausea; unusual tiredness or weakness; or yellow eyes or skin. These could be symptoms of a serious liver problem.
Rifampin will cause urine, stool, saliva, sputum, sweat, and tears to turn a reddish-orange to reddish-brown color. This is to be expected while you are using this medicine, and everything will return to normal once you stop using it. This effect may cause soft contact lenses to become permanently discolored, so it is best not to wear soft contact lenses while you are using this medicine. If you or your child have any questions about this, check with your doctor.
Birth control pills may not work properly while you are taking this medicine. To keep from getting pregnant, use another form of birth control together with your birth control pills. Other forms include condoms, diaphragms, or contraceptive foams or jellies.
Before you have any medical tests, tell the doctor in charge that you or your child are taking this medicine. The results of some tests may be affected by this medicine.
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.