HOW TO USE: This medication is given by injection into a vein by a health care professional in a hospital or clinic setting. If you are using this medication at home, learn all preparation and usage instruction from your health care professional. If you have any questions about using this medication properly, consult your doctor or pharmacist.Before using this product, check it visually for particles or discoloration. If either is present, do not use the liquid. It is usually infused slowly over 1 to 2 hours using an infusion pump. Infusing this medication too quickly can result in serious side effects. Do not mix with any other medications. When starting this medication, you will receive 2 to 3 doses per day for the first 2 to 3 weeks of treatment. This starting period is called "induction." Once induction is completed, you will then be given this medication usually once a day for the remainder of treatment. Dosage is based on your weight, kidney function, medical condition, and response to treatment.To prevent kidney damage, it is important to drink plenty of fluids while using this medication. Fluids may be given by vein to make sure you get enough.Antivirals work best when the amount of medicine in your body is kept at a constant level. Therefore, use this drug at evenly spaced intervals.It is very important to continue using this medication exactly as prescribed by your doctor. Stopping treatment too soon may result in ineffective treatment.Do not use more of this drug or infuse it more often or faster than prescribed by your doctor. Your condition will not improve faster, and you may experience side effects.If skin contact occurs, flush with plenty of water. If irritation occurs, contact your doctor immediately.Learn how to store and discard needles, medical supplies, and any unused medication safely. Consult your pharmacist. Never reuse needles or syringes.
SIDE EFFECTS: See also Warning section.Because this medication is used in patients who use other medications, it is difficult to tell which side effects are caused by foscarnet. Nausea, vomiting, headache, diarrhea, dizziness, loss of appetite, and increased sweating have been reported. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor immediately if any of these unlikely but serious side effects occur: mental/mood changes (e.g., depression, anxiety), new vision problems, muscle cramps/spasms, weakness, fast breathing, irregular heartbeat, change in the amount of urine, painful urination, vaginal sores, seizures, fever, persistent sore throat.You may experience redness, irritation, or pain at the injection site. Tell your doctor if this occurs. Also tell your doctor if you experience tingling or numbness of the hands or feet, or tingling around your mouth during or after the infusion. Your doctor may need to adjust your dose.A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
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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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