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Undecylenic Acid

Pronounced

"un-de-sil-EN-ik acid"

Common brand names:

Fungicure

Uses

This medication is used to treat skin fungal infections such as athlete's foot and jock itch. Undecylenic acid is a fatty acid that works by preventing the growth of fungus. This product should not be used to treat fungal infections of the scalp or nails.

How to Use This Medication

Use this medication on the skin only. Clean and thoroughly dry the area to be treated. Apply this medication to the affected skin, usually twice a day or as directed by your doctor or the product package. The dosage and length of treatment depends on the type of infection being treated.

Apply enough medication to cover the affected area and some of the surrounding skin. After applying this medication, wash your hands. Do not wrap, cover or bandage the area.

Do not apply this medication in the eyes, nose, mouth, or vagina. If this occurs, flush with plenty of water. If irritation occurs, contact your doctor right away.

Use this medication regularly in order to get the most benefit from it. Remember to use it at the same times each day.

Continue to use this medication for the full time as directed, even if symptoms disappear after a few days. Stopping the medication too early may result in a return of the infection.

Tell your doctor if your condition lasts after 2 to 4 weeks or gets worse at any time, or if you think you may have a serious medical problem.

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Drug information is selected from data included with permission and copyrighted by First DataBank, Inc. This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your healthcare professional. Always seek the advice of your healthcare professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your healthcare professional. This information does not contain any assurances that this product is safe, effective or appropriate for you.

This information is intended only for residents of the United States. Products sold under the same brand names in other countries may contain different ingredients.

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Information expires December 2025.