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Vfend

Generic Name: voriconazole (vor i KON a zole)
Brand Names: Vfend

What is Vfend?

Vfend (voriconazole) is an antifungal medicine.

Vfend is used to treat infections caused by yeast or other types of fungus.

Vfend may also be used for purposes not listed in this medication guide.

Important information

Do not use Vfend if you are pregnant. It could harm the unborn baby.

There are many other medicines that can cause serious or life-threatening drug interactions with voriconazole. Tell your doctor about all the prescription and over-the-counter medications you use.

Before taking Vfend, tell your doctor if you have heart rhythm problems, an electrolyte imbalance, liver or kidney disease, or a history of allergy to other antifungal medications such as fluconazole (Diflucan), ketoconazole (Nizoral), or itraconazole (Sporanox).

Take this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antifungal medicine. This medicine will not treat a viral infection such as the common cold or flu.

Vfend can cause problems with your vision. If you use this medicine for more than 28 days, you may need to have your eyes checked.

Before taking this medicine

You should not take Vfend if you are allergic to voriconazole.

Some medicines can cause unwanted or dangerous effects when used with Vfend. Your doctor may need to change your treatment plan if you use any of the following drugs:

  • carbamazepine;

  • cisapride;

  • efavirenz;

  • pimozide;

  • quinidine;

  • rifabutin, rifampin;

  • ritonavir;

  • sirolimus;

  • St. John's wort;

  • certain barbiturates (mephobarbital, phenobarbital); or

  • "ergot" migraine headache medicines (dihydroergotamine, ergotamine, ergonovine, methylergonovine).

To make sure Vfend is safe for you, tell your doctor if you have ever had:

  • heart disease;

  • a heart rhythm disorder such as long QT syndrome;

  • high or low levels of calcium, potassium, or magnesium in your blood;

  • liver or kidney disease; or

  • trouble digesting sugar or dairy products (the tablets contain lactose, liquid contains sucrose).

Do not use Vfend if you are pregnant. It could harm the unborn baby. Use effective birth control to prevent pregnancy while you are using this medicine>

It is not known whether voriconazole passes into breast milk or if it could affect the nursing baby. Tell your doctor if you are breast-feeding.

Vfend is not approved for use by anyone younger than 12 years old.

How should I use Vfend?

Take Vfend exactly as prescribed by your doctor. Follow all directions on your prescription label. Do not use this medicine in larger or smaller amounts or for longer than recommended.

Vfend may be given to you as an injection at the start of your treatment, or until you are able to take it by mouth (orally). Injectable Vfend is given into a vein through an IV. You may be shown how to use an IV at home. Do not give yourself this medicine if you do not understand how to use the injection and properly dispose of needles, IV tubing, and other items used.

Injectable Vfend is a powder medicine that must be mixed 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 use the medicine if it has changed colors or has particles in it. Call your pharmacist for new medicine.

Prepare your dose only when you are ready to give an injection. If you cannot use the mixed IV medicine right away, store it in the refrigerator and use it within 24 hours. Do not freeze.

Use a disposable needle and syringe only once. Follow any state or local laws about throwing away used needles and syringes. Use a puncture-proof "sharps" disposal container (ask your pharmacist where to get one and how to throw it away). Keep this container out of the reach of children and pets.

Take Vfend tablets or liquid at least 1 hour before or 1 hour after eating a meal.

Shake the oral suspension (liquid) well just before you measure a dose. Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.

Do not mix the liquid medicine with any other medicine or liquid.

Store tablets or liquid at room temperature away from moisture and heat. Do not store in a refrigerator or freezer. Keep the medicine bottle tightly closed when not in use. Throw away any unused liquid after 14 days.

Use this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antifungal medicine. Vfend will not treat a viral infection such as the flu or a common cold.

Vfend is sometimes given for up to several days after lab tests show that the infection has cleared. Very severe infections may need to be treated for several weeks.

While using this medicine, you may need frequent blood tests. Your vision and kidney or liver function may also need to be checked.

See also: Dosage Information (in more detail)

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

Call your doctor for instructions if you miss a dose of injectable Vfend.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking Vfend?

Vfend may cause vision changes such as blurred vision and sensitivity to light. Wear sunglasses during the day to protect your eyes from bright light. Be careful if you drive or do anything that requires you to be alert and able to see clearly.

Avoid exposure to sunlight or tanning beds. Voriconazole can make you more sensitive to sunlight or cause a serious skin reaction, including lesions that may lead to skin cancer. Wear protective clothing and use sunscreen (SPF 30 or higher) when you are outdoors.

Vfend side effects

Some side effects may occur during the injection. Tell your caregiver right away if you feel dizzy, nauseated, light-headed, itchy, sweaty, or have chest tightness or trouble breathing.

Get emergency medical help if you have signs of an allergic reaction to Vfend: hives, rash, itching, sweating; fever; fast heartbeats, chest tightness, difficult breathing; nausea, feeling light-headed; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • headache with chest pain and severe dizziness, fainting, fast or pounding heartbeats;

  • a sunburn;

  • vision problems, changes in your color vision;

  • slow heart rate, weak pulse, fainting, slow breathing;

  • kidney problems - little or no urinating; painful or difficult urination; swelling in your feet or ankles; feeling tired or short of breath;

  • liver problems - nausea, vomiting, flu-like symptoms, itching, feeling very tired, or jaundice (yellowing of the skin or eyes); or

  • severe skin reaction - fever, mouth sores, swelling in your face or tongue, trouble breathing or swallowing, rash with blistering and peeling.

Common Vfend side effects may include:

  • vision changes;

  • rash;

  • headache, hallucinations;

  • fast heart rate;

  • nausea, vomiting; or

  • abnormal liver function tests.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

What other drugs will affect Vfend?

Many drugs can interact with voriconazole, and some drugs should not be used together. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide. Tell your doctor about all your current medicines and any medicine you start or stop using.

Where can I get more information?

  • Your pharmacist can provide more information about Vfend.
  • Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Vfend only for the indication prescribed.
  • Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2017 Cerner Multum, Inc. Version: 9.04.

Date modified: August 01, 2017
Last reviewed: June 22, 2017

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