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Fluconazole

Generic Name: fluconazole (floo KOE na zole)
Brand Name: Diflucan

Medically reviewed on April 13, 2018

What is fluconazole?

Fluconazole is an antifungal medicine.

Fluconazole is used to treat infections caused by fungus, which can invade any part of the body including the mouth, throat, esophagus, lungs, bladder, genital area, and the blood.

Fluconazole is also used to prevent fungal infection in people who have a weak immune system caused by cancer treatment, bone marrow transplant, or diseases such as AIDS.

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

Important Information

Tell your doctor about all your current medicines and any you start or stop using. Many drugs can interact, and some drugs should not be used together.

Before taking this medicine

You should not use fluconazole if you are allergic to it.

Some medicines can cause unwanted or dangerous effects when used with fluconazole. Your doctor may change your treatment plan if you also use:

  • an antibiotic, antifungal, or antiviral medicine;

  • a blood thinner;

  • cancer medicine;

  • cholesterol medication;

  • oral diabetes medicine;

  • heart or blood pressure medication;

  • medicine for malaria or tuberculosis;

  • medicine to prevent organ transplant rejection;

  • medicine to treat depression or mental illness;

  • an NSAID (nonsteroidal anti-inflammatory drug);

  • seizure medicine; or

  • steroid medicine.

Tell your doctor if you have ever had:

The liquid form of fluconazole contains sucrose. Talk to your doctor before using this form of fluconazole if you have a problem digesting sugars or milk.

Fluconazole may harm an unborn baby. Use effective birth control to prevent pregnancy while you are using this medicine, and tell your doctor if you become pregnant.

It may not be safe to breast-feed a baby while you are using this medicine. Ask your doctor about any risks.

How should I take fluconazole?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Your dose will depend on the infection you are treating. Vaginal infections are often treated with only one pill. For other infections, your first dose may be a double dose. Carefully follow your doctor's instructions.

You may take fluconazole with or without food.

Shake the oral suspension (liquid) before you measure a dose. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

Use this medicine for the full prescribed length of time, even if your symptoms quickly improve. Skipping doses can increase your risk of infection that is resistant to medication. Fluconazole will not treat a viral infection such as the flu or a common cold.

Call your doctor if your symptoms do not improve, or if they get worse.

Store the tablets at room temperature away from moisture and heat.

You may store liquid fluconazole in a refrigerator, but do not allow it to freeze. Throw away any leftover liquid that is more than 2 weeks old.

What happens if I miss a dose?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. Overdose symptoms may include confusion or unusual thoughts or behavior.

What should I avoid while taking fluconazole?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.

Fluconazole side effects

Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).

Call your doctor at once if you have:

  • fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness (like you might pass out);

  • fever, chills, body aches, flu symptoms;

  • easy bruising or bleeding, unusual weakness;

  • seizure (convulsions);

  • skin rash or skin lesions; or

  • liver problems--loss of appetite, stomach pain (upper right side), dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Common side effects may include:

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 fluconazole?

Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.

Many drugs can interact with fluconazole, 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.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.