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.

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.

Irritation or burning of the treated skin may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

If your doctor has directed you to use this medication, remember that your doctor 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.

A very serious allergic reaction to this drug is rare. However, get medical help right away 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 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Before using undecylenic acid, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

If you have any health problems, consult your doctor or pharmacist before using this product.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Tell your doctor if you are pregnant before using this medication.

It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

This medicine may be harmful if swallowed. If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call 1-800-222-1222. Canada residents can call 1-844-764-7669.

Do not share this medication with others.

When treating athlete's foot, wear well-ventilated shoes and change socks at least once a day.

If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Use your next dose at the regular time. Do not double the dose to catch up.

Refer to the storage information printed on the package. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.