Skip navigation
MedlinePlus Trusted Health Information for You U.S. National Library of MedicineNational Institutes of Health
Contact Us FAQs Site Map About MedlinePlus
español Home Health Topics Drugs & Supplements Medical Encyclopedia Dictionary News Directories Other Resources

Other drug names:  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  0-9

Fluorouracil Topical

(flure oh yoor' a sil)

Printer-friendly versionE-mail this page to a friend

Contents of this page:

Why is this medication prescribed?   Return to top

Fluorouracil cream and topical solution are used to treat actinic or solar keratoses (scaly or crusted lesions [skin areas] caused by years of too much exposure to sunlight). Fluorouracil cream and topical solution are also used to treat a type of skin cancer called superficial basal cell carcinoma if usual types of treatment cannot be used. Fluorouracil is in a class of medications called antimetabolites. It works by killing fast-growing cells such as the abnormal cells in actinic keratoses and basal cell carcinoma.

How should this medicine be used?   Return to top

Fluorouracil comes as a solution and a cream to apply to the skin. It is usually applied to the affected areas twice a day . To help you remember to use fluorouracil , apply it around the same time every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use fluorouracil exactly as directed. Do not apply more or less of it or apply it more often than prescribed by your doctor.

If you are using fluorouracil to treat actinic or solar keratoses, you should continue using it until the lesions start to peel off. This usually takes about 2 to 4 weeks. However, the lesions may not be completely healed until 1 or 2 months after you stop using fluorouracil.

If you are using fluorouracil to treat basal cell carcinoma, you should continue using it until the lesions are gone. This usually takes at least 3 to 6 weeks, but may take as long as 10 to 12 weeks.

During the first few weeks of treatment, the skin lesions and surrounding areas will feel irritated and look red, swollen, and scaly. This is a sign that fluorouracil is working. Do not stop using fluorouracil unless your doctor has told you to do so.

Apply fluorouracil cream with a nonmetal applicator, a glove, or your finger. If you apply fluorouracil cream with your finger, be sure to wash your hands well immediately afterwards. Do not cover the treated areas with a bandage or dressing unless your doctor tells you to.

Do not apply fluorouracil cream or topical solution to the eyelids or the eyes, nose, or mouth.

Other uses for this medicine   Return to top

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

What special precautions should I follow?   Return to top

Before using fluorouracil,

What special dietary instructions should I follow?   Return to top

Unless your doctor tells you otherwise, continue your normal diet.

What should I do if I forget a dose?   Return to top

Apply the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not apply a double dose to make up for a missed one.

What side effects can this medication cause?   Return to top

Fluorouracil may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

Some side effects can be serious. The following symptoms are uncommon, but if you experience any of them, call your doctor immediately:

Fluorouracil may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at http://www.fda.gov/MedWatch/index.html] or by phone [1-800-332-1088].

What storage conditions are needed for this medicine?   Return to top

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

In case of emergency/overdose   Return to top

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know?   Return to top

Keep all appointments with your doctor.

Do not let anyone else use your medication. Ask your pharmacist any questions you have about refilling your prescription.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

Brand names   Return to top

  • Efudex®

Other names   Return to top

  • 5-FU

Last Revised - 04/01/2005


ASHP Logo
American Society of Health-System Pharmacists, Inc. Disclaimer

AHFS® Consumer Medication Information. © Copyright, 2008. The American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.