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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Noorish Foot Co. Anti-fungal Pen
Generic Name
Anti-fungal Pen
Active Ingredient
Undecylenic AcidCategory
Other
Variants
2
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Noorish Foot Co. Anti-fungal Pen, you must consult a qualified healthcare professional.
Detailed information about Noorish Foot Co. Anti-fungal Pen
Undecylenic Acid is a potent antifungal fatty acid used topically to treat various skin fungal infections, including athlete's foot, jock itch, and ringworm by inhibiting fungal growth and reproduction.
For most fungal infections of the skin, the standard application protocol for undecylenic acid involves a consistent twice-daily regimen.
Undecylenic acid is generally considered safe for children aged 2 years and older when used under adult supervision. The dosage and frequency are identical to the adult dosage (twice daily).
Since systemic absorption is minimal, no dosage adjustments are required for patients with kidney disease. However, patients should avoid applying the product to large open wounds where absorption could theoretically occur.
No dosage adjustments are necessary for patients with liver disease due to the localized nature of the treatment.
No specific adjustments are needed for geriatric patients. However, healthcare providers should monitor for skin thinning or fragility, which may increase the risk of local irritation.
Proper application technique is critical for the success of antifungal therapy:
If you miss a dose, apply it as soon as you remember. If it is almost time for your next scheduled application, skip the missed dose and resume your regular schedule. Do not 'double up' the amount applied to make up for a missed dose.
Topical overdose is unlikely. However, if the medication is accidentally ingested, it may cause gastrointestinal distress, nausea, or vomiting.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose or stop treatment early without medical guidance, as this increases the risk of the infection returning.
Undecylenic acid is generally well-tolerated, but local skin reactions are the most frequently reported side effects. These typically occur at the site of application and include:
Undecylenic acid is for external use only. It must never be taken by mouth, used in the eyes, or applied to mucous membranes (such as inside the nose, mouth, or vaginal area). If the product comes into contact with these areas, rinse thoroughly with water.
Patients with certain underlying health conditions must exercise extreme caution. Specifically, individuals with diabetes mellitus or peripheral vascular disease (poor blood circulation) should not use this product unless specifically directed by a healthcare provider. In these populations, minor skin irritations can lead to serious complications, such as non-healing ulcers or secondary bacterial infections.
There are no FDA black box warnings for Undecylenic Acid. It is widely available as an over-the-counter medication due to its established safety record over several decades of use.
There are no known systemic drug-drug interactions that are strictly contraindicated with topical undecylenic acid. However, it should not be used simultaneously on the same area of skin with other topical medications unless directed by a doctor, as this can lead to chemical incompatibilities or severe skin irritation.
Undecylenic acid must NEVER be used in the following circumstances:
Conditions requiring a careful risk-benefit analysis by a physician include:
There are no adequate and well-controlled studies of topical undecylenic acid in pregnant women. However, because systemic absorption is negligible when applied to intact skin, the risk to the developing fetus is considered extremely low. According to the principles of clinical pharmacology, topical fatty acids are unlikely to reach the systemic circulation in concentrations that would cross the placenta. Nevertheless, it should be used during pregnancy only if clearly needed and after consultation with a healthcare provider.
It is not known whether topical undecylenic acid is excreted in human milk. However, given the minimal systemic absorption, it is unlikely to pose a risk to the nursing infant.
Undecylenic acid is a medium-chain fatty acid that exerts fungistatic activity. Its primary molecular mechanism involves the disruption of the fungal cell membrane. The 11-carbon chain of the acid allows it to partition into the lipid bilayer of the fungal plasma membrane. This insertion causes physical stress and changes in the fluidity of the membrane, leading to the formation of 'pores' or disorganized regions.
Additionally, undecylenic acid inhibits the enzyme fatty acid synthase in certain fungal species, preventing the fungus from producing its own essential lipids. It also interferes with the pH gradient across the cell membrane, which is vital for nutrient transport and energy production (ATP synthesis). In Candida species, it specifically inhibits the yeast-to-hyphae transition by interfering with the signaling pathways required for filamentation.
The dose-response relationship of undecylenic acid is localized. Higher concentrations (up to 25%) provide more robust fungistatic activity. The time to onset of symptomatic relief (reduction in itching) is typically 2 to 7 days, though the eradication of the fungus takes much longer. Tolerance to undecylenic acid has not been widely reported in clinical literature, making it a reliable option for recurrent infections.
Common questions about Noorish Foot Co. Anti-fungal Pen
Undecylenic acid is primarily used as a topical antifungal agent to treat superficial skin infections caused by fungi. It is FDA-approved for the treatment of tinea pedis (athlete's foot), tinea cruris (jock itch), and tinea corporis (ringworm). The medication works by inhibiting the growth of the fungus and disrupting its cell membrane. It is often found in over-the-counter creams, powders, and liquids. While effective for skin, it is generally not sufficient for treating fungal infections of the hair or nails on its own. Always consult a healthcare provider for a proper diagnosis before starting treatment.
The most common side effects of undecylenic acid are localized to the area where the medication is applied. These include mild skin irritation, a burning or stinging sensation, redness, and itching. Some patients may also notice dryness or peeling of the skin as the infection clears. These symptoms are usually mild and temporary. If you experience severe blistering, oozing, or swelling, you should stop using the product immediately. Contact your doctor if skin irritation becomes bothersome or worsens over time.
Yes, you can generally drink alcohol while using topical undecylenic acid. Because the medication is applied to the skin and very little of it enters your bloodstream, there are no known direct interactions with alcohol. However, it is always wise to consume alcohol in moderation, as it can affect your overall immune health and skin hydration. If you are using any oral medications in addition to this topical treatment, check with your pharmacist about alcohol interactions for those specific drugs. Always follow the safety guidelines provided on the product packaging.
Undecylenic acid is generally considered low-risk during pregnancy because it is applied topically and has minimal systemic absorption. There is no evidence suggesting it causes birth defects or other pregnancy complications in humans. However, it has not been extensively studied in pregnant populations in clinical trials. It is recommended that pregnant women consult their healthcare provider before using any medication, including over-the-counter antifungals. Your doctor will weigh the benefits of treating the fungal infection against any theoretical risks to the baby.
While you may begin to feel relief from itching and burning within a few days, it takes several weeks to fully clear a fungal infection. For jock itch, the typical treatment course is 2 weeks of twice-daily application. For athlete's foot and ringworm, the treatment usually lasts for 4 weeks. It is crucial to continue applying the medication for the entire duration recommended, even if the skin looks healthy. Stopping treatment early is the most common reason for the infection to return shortly after.
You can stop using undecylenic acid at any time without experiencing withdrawal symptoms, as it is not an addictive or systemic medication. However, stopping the treatment before the fungus is completely eradicated often leads to a relapse. Fungal spores can be resilient and may remain on the skin even after the visible rash has disappeared. To ensure the infection is gone, you should complete the full 2-to-4-week course as directed. If you experience a severe allergic reaction, you must stop the medication immediately and seek medical advice.
If you miss a dose of undecylenic acid, apply it as soon as you remember to maintain consistent levels of the medication on the skin. If it is nearly time for your next scheduled application, simply skip the missed dose and continue with your regular routine. Do not apply a double layer of the cream or solution to make up for the missed application, as this may increase the risk of skin irritation. Consistency is key to successfully treating fungal infections. Try to set a reminder to apply the medication every morning and evening.
No, undecylenic acid does not cause weight gain. It is a topical antifungal medication that acts locally on the skin's surface. It does not contain hormones or steroids, and it does not affect your metabolism or appetite. Because systemic absorption into the bloodstream is negligible, it cannot influence body weight. If you are experiencing unexplained weight gain while using this product, it is likely due to other factors or medications. You should discuss any significant changes in your weight with your healthcare provider.
Undecylenic acid is generally safe to use alongside oral medications because it does not enter the bloodstream in significant amounts. However, you should be cautious when using other topical products on the same area of skin. Mixing different creams, ointments, or lotions can cause skin irritation or prevent the antifungal from working correctly. If you are using topical steroids or other medicated skin treatments, consult your doctor or pharmacist. They can help you coordinate an application schedule that avoids potential interactions.
Yes, undecylenic acid and its salt, zinc undecylenate, are widely available as generic products. They are also the active ingredients in many well-known brand-name antifungal powders and creams. Generic versions are required by the FDA to have the same quality and efficacy as brand-name versions. You can often find these products in the foot care or first aid section of most pharmacies and grocery stores. Choosing a generic version can be a cost-effective way to treat fungal infections without sacrificing the quality of the treatment.
Other drugs with the same active ingredient (Undecylenic Acid)
While extremely rare for a topical antifungal, serious reactions can occur.
> Warning: Stop taking Undecylenic Acid and call your doctor immediately if you experience any of these:
Undecylenic acid is not intended for long-term or chronic use. Prolonged use (beyond the recommended 4 weeks) may lead to:
No FDA black box warnings have been issued for undecylenic acid. It is considered to have a high safety profile when used as directed on the skin.
Report any unusual symptoms or worsening of your condition to your healthcare provider. You may also report side effects to the FDA at 1-800-FDA-1088.
For standard OTC use, laboratory monitoring (like blood counts or liver tests) is not required. However, clinical monitoring is essential:
Undecylenic acid is a topical agent and does not cross the blood-brain barrier in significant amounts. It has no known effect on the ability to drive or operate heavy machinery.
There are no known direct interactions between topical undecylenic acid and alcohol consumption. However, alcohol can sometimes exacerbate skin flushing or dehydration, which might indirectly affect skin comfort.
There is no need to taper undecylenic acid. However, it is vital to complete the full course of treatment (usually 2-4 weeks) even if symptoms resolve within the first few days. Stopping too early can allow remaining fungal spores to regrow, leading to a recurrence of the infection.
> Important: Discuss all your medical conditions, especially diabetes or circulation problems, with your healthcare provider before starting Undecylenic Acid.
There are no known interactions between topical undecylenic acid and specific foods, including grapefruit, dairy, or caffeine. Because the drug is not absorbed systemically, dietary factors do not influence its metabolism.
Undecylenic acid is not known to interfere with standard blood or urine laboratory tests. It does not affect glucose monitoring in diabetic patients, though the physical presence of the ointment on the fingers could theoretically contaminate a finger-stick test if the hands are not washed.
To minimize the risk of interactions:
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, even those applied to the skin.
There is a potential for cross-sensitivity among various fatty acid derivatives. Patients who react poorly to sebacic acid or other medium-chain fatty acids in cosmetics should use undecylenic acid with caution. Additionally, many undecylenic acid ointments contain lanolin (wool fat), which is a common allergen. Patients with a known wool allergy should check the inactive ingredients list carefully.
> Important: Your healthcare provider will evaluate your complete medical history, including your circulatory health, before prescribing or recommending Undecylenic Acid.
Undecylenic acid is approved for use in children aged 2 to 12 years for the treatment of ringworm and athlete's foot.
Elderly patients may use undecylenic acid safely, but they should be monitored for:
No dosage adjustment is required. The amount of drug that reaches the kidneys is clinically insignificant in patients with normal skin barrier function.
No dosage adjustment is required. The liver is not significantly involved in the clearance of this topical medication.
> Important: Special populations, particularly those with metabolic or circulatory disorders, require individualized medical assessment before using any antifungal therapy.
| Parameter | Value |
|---|---|
| Bioavailability | <5% (on intact skin) |
| Protein Binding | N/A (localized) |
| Half-life | N/A (topical) |
| Tmax | N/A (topical) |
| Metabolism | Beta-oxidation (if absorbed) |
| Excretion | Renal (negligible) |
Undecylenic acid is classified as a Topical Antifungal Fatty Acid. It is often grouped with other OTC antifungals like tolnaftate and the azoles, though its chemical structure is distinct. It is frequently formulated with Zinc Undecylenate to enhance its therapeutic effect through the astringent properties of zinc.