Undecylenic acid is an antifungal medication you can apply directly to your skin to treat fungal infections. You can buy it without a prescription at most drugstores and pharmacies.
If you’re dealing with a stubborn skin infection, such as jock itch, you may be wondering whether an undecylenic acid treatment might be right for you, or if a fungi cure wash is a better solution. This article will tell you what you need to know, including what it does, what brand names it’s sold under, and some important things to keep in mind.
What is Undecylenic Acid?
Undecylenic acid (C11H20O2) is a type of fatty acid that comes from castor oil. It is a topical antifungal medication that can treat fungal infections on the skin, like athlete’s foot and ringworm. It works by preventing the growth of fungus.
Undecylenic acid is an older treatment, so newer medications are sometimes favored, but it’s important to understand the factors that affect fungus, such as whether toenail fungus is acidic or alkaline. You can find it in the DrugBank database under ID DB11117, and its ATC codes are D01AE04 and D01AE54.
Brand names and formulations
If you’re looking for undecylenic acid to treat a fungal infection, you’ll find it at your local pharmacy or online under a variety of brand names.
Common brand names
- Desenex
- Fungi-Nail
- Tineacide
- Pedi-Pro
- Breezee Mist Foot Powder
These brands each offer a slightly different formulation of undecylenic acid. You can choose a product that best fits your preferences. For example, some people prefer a spray, while others want a cream.
Available formulations
You can find undecylenic acid in these over-the-counter (OTC) forms:
- topical solutions
- sprays
- creams
- powders
- tinctures
The strength of the undecylenic acid will vary, depending on the formulation.
- Powders: 10%, 12%, 19%
- Topical solution/spray: 25%
- Cream: 20%, 25%
Multi-Ingredient Medications
To increase the effectiveness of undecylenic acid, manufacturers sometimes combine it with other drugs, similar to using manuka oil for healthy skin and nails.
For example, chloroxylenol is often combined with undecylenic acid. You can find chloroxylenol/undecylenic acid under the brand name Gordochom. The goal is that these combinations will kill more fungi and bacteria than one ingredient alone.
How to use it
Different products may have different instructions, so make sure you read the package or talk to a pharmacist about the specific undecylenic acid product you’re using.
Here are some general guidelines:
- Before applying, wash the affected area and dry it well.
- Apply a thin layer of the medication to the affected area twice a day.
- If you’re using a cream, rub it in well.
- If you’re using a powder, sprinkle it between your toes, on your feet, and inside your socks and shoes.
- If you’re using an aerosol spray, hold the can 4 to 6 inches away from your skin when you spray.
How much to use and for how long
The right amount of medication and the length of time you’ll need to use it will depend on your particular situation. Your doctor can give you specific instructions. In general, it’s a good idea to continue treatment for at least two weeks after your symptoms have gone away, unless your doctor tells you otherwise.
What if I miss a dose?
If you miss a dose, use it as soon as you remember. However, if it’s almost time for your next dose, skip the missed dose and go back to your regular schedule.
Precautions and Warnings
Here are a few things to keep in mind when using undecylenic acid:
- Don’t use it if you’re allergic to undecylenic acid or any of the other inactive ingredients.
- It’s for external use only, so don’t get it in your eyes.
- Keep it where kids can’t reach it.
- If you’re pregnant or breastfeeding, talk to your doctor before using it.
- Stop using it and see a doctor if your skin gets irritated.
- If your condition doesn’t get better or gets worse after a month, see a healthcare pro.
Potential Side Effects
Like any topical treatment, undecylenic acid can cause side effects. The most common is skin irritation, which might include redness, itching, or a burning sensation.
If you experience severe irritation, stop using the product and talk to your doctor.
Frequently Asked Questions
Can you buy tolnaftate over the counter?
Yes, tolnaftate is a common antifungal medication that you can typically find over the counter (OTC) at pharmacies and drugstores. It’s often used to treat fungal infections like athlete’s foot.
What is the brand name for undecylenic acid?
Undecylenic acid is often found as an active ingredient in various antifungal products. A well-known brand name is Fungi-Nail, though many generic and store-brand antifungal treatments also contain undecylenic acid.
Does castor oil contain undecylenic acid?
Castor oil itself does not directly contain undecylenic acid. However, undecylenic acid can be derived from castor oil through a chemical process called pyrolysis. This process breaks down ricinoleic acid (the main component of castor oil) into undecylenic acid and heptanal.
How long does it take for undecylenic acid to work?
The time it takes for undecylenic acid to show results can vary depending on the severity of the infection. Generally, you should expect to see improvement within a few weeks of consistent use. It’s crucial to continue treatment for the full recommended duration, even if symptoms improve, to prevent recurrence.
What is the strongest OTC antifungal?
Determining the “strongest” OTC antifungal depends on the specific infection and individual response. Medications like clotrimazole, miconazole, terbinafine, and undecylenic acid are all effective options. Terbinafine (Lamisil AT) is often considered a strong choice for athlete’s foot, but it’s always best to consult with a doctor or pharmacist to determine the most appropriate treatment for your particular situation.
Key Takeaways
Undecylenic acid is a topical antifungal medicine that works well on the surface of the skin.
Follow the directions closely when using undecylenic acid. Be aware of possible side effects and precautions.
Talk to your doctor for medical advice and to find out if undecylenic acid is right for you.