Generic name: undecylenic acid topical (un deh si LEN ik AS id)
Brand name: Blis-To-Sol Powder, Elon Dual Defense Anti-Fungal Formula, Fungicure, Fungi-Nail, Myco Nail A, Tineacide, Undelenic
Drug class: Topical antifungals
What is Fungi-Nail?
Undecylenic acid is a fatty acid that works by preventing fungus from growing on the skin.
Fungi-Nail may also be used for purposes not listed in this medication guide.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
Before taking this medicine
You should not use Fungi-Nail if you are allergic to it.
Ask a doctor or pharmacist if Fungi-Nail is safe to use if you have sensitive skin or allergies.
Do not give this medicine to a child without medical advice.
Ask a doctor before using this medicine if you are pregnant or breast-feeding.
How should I use Fungi-Nail?
Use exactly as directed on the label, or as prescribed by your doctor.
Do not take by mouth. Topical medicine is for use only on the skin.
Use only the Fungi-Nail formulation made for the specific body area you are treating (such as your feet, groin, or nails). This medicine will not be effective if you do not use the correct formulation.
Do not allow a young child to use Fungi-Nail without help from an adult.
Wash your hands before and after using this medicine.
If you are using Fungi-Nail on your feet, apply the medicine to all areas including between your toes.
Do not cover treated skin with a bandage. You may cover the skin with a cotton gauze dressing to protect your clothing.
Avoid wearing tight-fitting, synthetic clothing (such as nylon) that doesn't allow air circulation. Wear loose clothing made of cotton and other natural fibers until the infection is healed.
Change your shoes and socks at least once daily while treating athlete's foot.
Call your doctor if your symptoms do not improve after 4 weeks of treatment.
Use this medicine for the full prescribed length of time, even if your symptoms quickly improve.
Store at room temperature away from moisture and heat. Do not freeze.
What happens if I miss a dose?
Apply the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not apply two doses at one time.
What happens if I overdose?
An overdose of Fungi-Nail is not expected to be dangerous. Seek emergency medical attention or call the Poison Help line at 1-800-222-1222 if anyone has accidentally swallowed the medication.
What should I avoid while using undecylenic acid topical?
Do not get Fungi-Nail in your eyes. If contact does occur, rinse with water.
Fungi-Nail side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
severe burning or stinging of treated skin; or
any new skin symptoms.
Common side effects may include:
irritation of treated skin.
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.
What other drugs will affect Fungi-Nail?
Medicine used on the skin is not likely to be affected by other drugs you use. But many drugs can interact with each other. Tell each of your health care providers about all medicines you use, including prescription and over-the-counter medicines, vitamins, and herbal products.
Frequently asked questions
More about Fungi-Nail (undecylenic acid topical)
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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.
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