Treats infections caused by cytomegalovirus (CMV) in patients who have acquired immune deficiency (AIDS). Also treats herpes simplex virus (HSV) infections in the mucus membranes (nose, mouth, vagina, or rectum).
Your doctor will prescribe your exact dose and tell you how often it should be given.
Your medicine will be put directly into your body through one of your veins. This is called intravenous (in-tra-VEEN-us), or IV.
The medicine is usually given slowly over a period of 1 to 2 hours or more.
This medicine may damage your kidneys. To help prevent this, you may have extra liquids given intravenously before or with your treatment. Your doctor may also want you to drink extra liquids while you are being given this medicine.
Your treatment will be given by a nurse or other caregiver trained to give IV medicine. Sometimes you, a family member, or a friend can be taught to give your medicine.
Before your treatment, check your IV bag or bottle to make sure there are no leaks. The liquid should be clear and colorless (like water).
If a dose is missed:
This medicine needs to be given on a regular schedule. If you miss a dose, call your doctor for instructions.
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are also taking zidovudine (AZT, Retrovir®), amikacin, gentamicin, netilmicin, tobramycin, vancomycin, amphotericin B (Fungizone®), or pentamidine (Pentam®) injections.
Before using this medicine, make sure your doctor knows if you have kidney disease, anemia, seizures, or low levels of calcium in your body (hypocalcemia).
If you are pregnant or breastfeeding, talk to your doctor before taking this medicine. You should not breastfeed if you have HIV or AIDS, because you may give the infection to your baby through your breast milk.
Foscarnet will not cure CMV infections or HSV infections, but may slow the progress of these diseases.
If you are getting this medicine for a CMV eye infection, it is important for you to have your eyes checked regularly. Keep all appointments your eye doctor makes for you.
Your doctor may want to test your blood on a regular schedule while you are getting this medicine. Keep all appointments your doctor makes for you.
Foscarnet may lower the amounts of calcium and other minerals in your body. If these levels get too low, you may feel tingling around your mouth or numbness, pain, or tingling in your hands and feet. If you have these symptoms, call your doctor right away.
Do not get the medicine on your skin. If this does happen, rinse the area well with water and tell your caregiver.
This medicine may make you dizzy. If it does, avoid driving or using machinery.