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(foscarnet sodium) Injection
RENAL IMPAIRMENT IS THE MAJOR TOXICITY OF FOSCAVIR (foscarnet sodium injection) . FREQUENT MONITORING OF SERUM CREATININE, WITH DOSE ADJUSTMENT FOR CHANGES IN RENAL FUNCTION, AND ADEQUATE HYDRATION WITH ADMINISTRATION OF FOSCAVIR, IS IMPERATIVE. (See ADMINISTRATION section; Hydration.)
SEIZURES, RELATED TO ALTERATIONS IN PLASMA MINERALS AND ELECTROLYTES, HAVE BEEN ASSOCIATED WITH FOSCAVIR (foscarnet sodium injection) TREATMENT. THEREFORE, PATIENTS MUST BE CAREFULLY MONITORED FOR SUCH CHANGES AND THEIR POTENTIAL SEQUELAE. MINERAL AND ELECTROLYTE SUPPLEMENTATION MAY BE REQUIRED.
FOSCAVIR (foscarnet sodium injection) IS INDICATED FOR USE ONLY IN IMMUNOCOMPROMISED PATIENTS WITH CMV RETINITIS AND MUCOCUTANEOUS ACYCLOVIR-RESISTANT HSV INFECTIONS. (See INDICATIONS section.)
FOSCAVIR is the brand name for foscarnet sodium. The chemical name of foscarnet sodium is phosphonoformic acid, trisodium salt. Foscarnet sodium is a white, crystalline powder containing 6 equivalents of water of hydration with an empirical formula of Na3CO5P•6 H20 and a molecular weight of 300.1. The structural formula is:
FOSCAVIR (foscarnet sodium injection) has the potential to chelate divalent metal ions, such as calcium and magnesium, to form stable coordination compounds. FOSCAVIR (foscarnet sodium injection) INJECTION is a sterile, isotonic aqueous solution for intravenous administration only. The solution is clear and colorless. Each milliliter of FOSCAVIR contains 24 mg of foscarnet sodium hexahydrate in Water for Injection, USP. Hydrochloric acid and/or sodium hydroxide may have been added to adjust the pH of the solution to 7.4. FOSCAVIR (foscarnet sodium injection) INJECTION contains no preservatives.
What are the possible side effects of foscarnet (Foscavir)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using foscarnet and call your doctor at once if you have any of these serious side effects:
- urinating less than usual or not at all;
- drowsiness, confusion, mood changes, increased thirst, loss of appetite, nausea and vomiting;
- swelling, weight gain, feeling short of breath;
- numbness or tingling around your mouth or in your hands or feet;
- dry mouth, increased thirst, restless...
What are the precautions when taking foscarnet sodium injection (Foscavir)?
Before using foscarnet, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver disease, kidney disease, dehydration, low electrolyte levels (calcium, magnesium, potassium, phosphate), nervous system problems (e.g., seizure history), heart disease.
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
Caution is advised when using this drug in children...
Last reviewed on RxList: 9/11/2008
This monograph has been modified to include the generic and brand name in many instances.
Additional Foscavir Information
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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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