How is foscarnet given?
Follow all directions on your prescription label. Your doctor may occasionally change your dose. Do not use this medicine in larger or smaller amounts or for longer than recommended.
Foscarnet is injected into a vein through an IV using an infusion pump. The medicine enters the body through a catheter placed into the vein. A healthcare provider will show you how to use an infusion pump. Do not self-inject foscarnet if you do not understand how to give the injection and properly dispose of used needles, IV tubing, and other items used to inject the medicine.
You may also be given IV fluids to keep you from getting dehydrated.
You may need to mix foscarnet with a liquid (diluent) before using it. If you are using the injections at home, be sure you understand how to properly mix and store the medicine. Do not give foscarnet with other medicines in the same IV line.
Foscarnet should be clear and colorless. Gently shake the medicine if appears to have separated. Do not use the medicine if it has changed colors or has particles in it. Call your pharmacist for new medicine.
The medicine must be injected slowly and can take up to 2 hours to complete. Injecting foscarnet too fast can cause dangerous or unwanted side effects.
Foscarnet is usually given for 2 to 3 weeks. Follow your doctor's dosing instructions very carefully.
While using foscarnet, your kidney function and electrolytes (potassium, sodium, magnesium, phosphorus) will need to be tested often, and you may also need regular eye exams.
Store foscarnet at room temperature away from very hot or very cold temperature.