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Tolnaftate for Fungal Infections - A Trusted Antifungal Medication

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An antifungal drug called Tolnaftate is used to treat fungal infections of the skin, including jock itch, ringworm, and athlete's foot.

Written by

Dr. Kinjal Shah

Medically reviewed by

Dr. Shubadeep Debabrata Sinha

Published At March 19, 2024
Reviewed AtMarch 19, 2024

Overview:

Human reports of fungal diseases are becoming more frequent. The rising number of instances may be due to enhanced diagnostic skills and the fact that doctors are searching for diseases other than bacteria, even if it may seem that these microbes are new arrivals or emerging pathogens. Physicians are looking for suitable antifungals to treat the rising incidence of reported fungal infections.

Fungal infections have been treated using a range of topical antiseptics. On August 27, 1971, the Food and Drug Administration (FDA) of the United States authorized Tolnaftate as an antifungal medication. In most areas, Tolnaftate, which is a synthetic thiocarbamate used as an antifungal agent, can be used without a prescription.

Drug Group:

Allylamines are a class of drugs that includes Tolnaftate. Allylamines are antifungal drugs that prevent the production of ergosterol, a crucial component of fungal cell membranes, which prevents the development and replication of the fungus.

Available Doses and Dosage Forms:

There are several over-the-counter (OTC) formulations and strengths available for Tolnaftate. These are the most common:

Doses:

  1. One Percent: It is the most popular strength for creams, gels, solutions, and sprays.

  2. Two Percent: More difficult-to-treat infections or those that do not respond to one percent strength are usually treated with this higher dosage.

Forms of Dosage:

  1. Cream: It is most often used because it has strong water resistance and absorption.

  2. Gel: Lighter and quicker to dry than cream, gel is appropriate for damp areas.

  3. Solution: Applying in between the toes and fingers is best done in this liquid state.

  4. Powder: Ideal for avoiding athlete's feet or for dusting big surfaces.

  5. Spray: Less quickly absorbed than other types, yet easy to apply to wide areas.

For Patients:

What Are Fungal Infections?

Fungi, which are tiny organisms different from bacteria and viruses, are the source of fungal infections, commonly referred to as mycosis. While these illnesses can affect any area of the body, they most frequently affect the mucous membranes, skin, nails, and hair. Some of the examples are:

  • Skin infections include ringworm, jock itch (fungal skin infection of genitals), athlete's foot (fungal infection between toes), and yeast infections.

  • Nail infections include onychomycosis (a fungal infection of nails).

  • Hair infections include scalp ringworm or tinea capitis.

  • Infections of the mucous membranes include vaginal yeast infections and oral thrush.

Immune system compromise makes people more vulnerable to fungal infections. Furthermore, the likelihood of having them can also be raised by warm, humid surroundings.

How Does Tolnaftate Work?

Tolnaftate works against fungi by preventing the formation of ergosterol, which is an essential part of the membranes that cover fungal cells. The structural integrity and functional integrity of fungal cells depend on ergosterol. The enzyme squalene epoxidase, which converts squalene to ergosterol, is inhibited by Tolnaftate. Tolnaftate alters the synthesis of ergosterol by interfering with this process, which changes the permeability and composition of the fungal cell membrane. Consequently, the fungal cell membrane weakens, which eventually causes cell death and the fungal infection to be eradicated.

What Is the Dosage of Tolnaftate?

Over-the-counter (OTC) formulations and strengths of Tolnaftate include creams, gels, solutions, powders, and sprays. The right dose is determined by many factors, including:

  • Kind of Infection: Depending on the ailment, other forms may be better (e.g., powder for athlete's foot, solution for nail fungus).

  • Infection Severity: More serious or resistant illnesses may require stronger dosages.

  • Personal Preference: Some individuals like the way cream feels on them, while others find sprays easier to use.

How Effective Is Tolnaftate?

For minor to severe fungal infections of the skin and nails, Tolnaftate is usually seen as a useful therapy. Research indicates that success rates can vary from 60 percent to 90 percent, contingent on the nature of the illness, length of therapy, and compliance with application guidelines.

But it is crucial to remember that:

  • Not all fungal infections can be treated with Tolnaftate; this is especially true for infections that are deeper or that impact the immune system.

  • To achieve the best effects, the course of treatment must be strictly adhered to.

  • Recurrence of fungal infections is possible, and Tolnaftate is not a treatment for them.

What Are the Things to Inform the Doctor Before Taking the Drug?

  • Current Medications: Tolnaftate may interact with some medications, reducing its impact or possibly causing unpleasant effects. Provide a detailed inventory of all the prescription and over-the-counter drugs used, including herbal and vitamin supplements.

  • Allergies: Inform the doctor about any allergies, particularly to antifungal drugs or substances that are similar.

  • Nursing a Baby or Expecting One: Inform the doctor about nursing or pregnancy. Although topical use is thought to be safe during pregnancy, it is important to get advice from the physician.

  • Medical Conditions: Let the doctor know if there are any underlying illnesses, such as diabetes (elevated blood sugar level), liver or renal disease, or a compromised immune system. These problems can affect the course of treatment or necessitate closer observation.

  • Infection Severity: Consult a physician if the fungal infection is severe, extensive, or does not get better with over-the-counter Tolnaftate. The physician could advise trying different therapies or prescribing stronger drugs.

How Is Tolnaftate Administered?

  1. For topical treatment, Tolnaftate is available as a cream, liquid, powder, gel, spray powder, or spray liquid. Usually, Tolnaftate is used twice a day. Pay close attention to the instructions on the packaging or the label of the medication. Utilize Tolnaftate precisely as prescribed. Use it exactly as prescribed by the doctor; do not take less or more of it.

  2. In two to three days, the jock itch or athlete's foot pain and burning should go away. Treat patients for a minimum of two weeks following the resolution of symptoms. It can take up to four to six weeks of therapy in total.

  3. After thoroughly cleaning the affected region and letting it dry, apply the medicine and rub it in gently until the majority of it goes away. Just enough medicine should be applied to the afflicted region. Once the medicine has been applied, one should wash the hands.

  4. Applying spray and powder between the toes is recommended; shoes and socks should be handled carefully. Before using a spray, shake it thoroughly to combine the drug and spray it from a minimum of six inches away.

What Are the Side Effects of Tolnaftate?

Tolnaftate side effects: Tolnaftate is generally well tolerated by most people, although some may have moderate side effects, such as:

  • Skin irritation might manifest as dryness, itching, burning, stinging, or redness where the application is made.

  • Rarely, more serious allergic responses such as hives, edema, or trouble breathing may happen.

Seek emergency medical assistance if the following effects are encountered:

  • Increased redness, swelling, or discomfort at the application site is indicative of a worsening infection.

Dietary Considerations:

There are no particular dietary requirements when taking Tolnaftate. On the other hand, eating a balanced diet high in fruits, vegetables, and whole grains will help strengthen the immune system as a whole and may even help prevent fungal infections.

Missed Dose:

Apply the missed Tolnaftate dosage as soon as it is recollected. But if the next dose is almost here, ignore the missing one and carry on according to the usual plan. Applying twice the dose would not make up for the missed one.

Overdose:

When used topically as instructed, a Tolnaftate overdose is unlikely to result in significant issues. But if inadvertently ingest a significant amount, get help right once, especially if experiencing any negative side effects.

Storage:

Keep this medication out of children's reach and in the sealed container it came in. Keep it out of the bathroom and at room temperature, away from sources of heat and moisture. Spray cans should not be punctured or thrown into flames.

It is important to dispose of unnecessary prescriptions in a certain manner so that children, dogs, and other people cannot ingest them. But this drug is not something one should flush down the toilet. The easiest way to get rid of the medication is to use a service called medicine take-back. Always lock safety caps on medications to prevent poisoning in small children, and store them right away in a secure spot that is out of their reach and sight.

For Doctors:

Indication:

  1. Demonstrated to be therapeutically successful in treating the majority of fungal infections, including those connected to or related to tinea corporis (ringworm), tinea cruris (jock itch), and tinea pedis (athlete's foot).

  2. For efficient relief of fungal infection-related itching, scaling, cracking, burning, redness, pain, irritation, and discomfort

  3. Prevents the majority of athlete's foot cases with regular usage.

Dose: Administered one to two times each day for two to four weeks, depending on the infection.

  • One Percent: This is the most widely accessible strength in a range of formats.

  • Two Percent: A stronger concentration, usually applied to illnesses that are resistant or hard to treat.

Dosing Considerations:

When deciding on the appropriate amount and type, the doctor will take into account the age, health, severity of the infection, and personal preferences.

  • Pay Close Attention to the Instructions: Always follow the doctor's or the product label's exact dose and application directions.

  • Do Not Take More Than Is Advised: Applying more than the advised dose would not get rid of the illness any quicker and might lead to further negative consequences.

  • Complete the Required Course: To avoid recurrence, take the drug as prescribed for the whole term, even if symptoms get better.

  • Before Quitting: Speak with the doctor about any concerns or the need to stop taking the drug before the recommended duration has passed.

Pharmacological Aspects of Tolnaftate

Pharmacodynamics: An artificial over-the-counter antifungal medication is Tolnaftate.

Mechanism: It is thought to block squalene epoxidase, a crucial enzyme in the biosynthesis of ergosterol, a crucial component of the fungal cell membrane, however, the precise mode of action is yet unknown. Ergosterol prevents the cell membrane from becoming brittle and leaky, which eventually causes the fungus to die.

Pharmacokinetics

  1. Absorption: When used topically, Tolnaftate has restricted systemic absorption. This indicates that it does not significantly enter the circulation and mostly remains in the applied region.

  2. Distribution: Tolnaftate attaches itself to keratin, the protein that makes up skin, hair, and nails, after being absorbed. As a result, it might gather in the affected region and have a long-lasting antifungal impact.

  3. Metabolism: In the epidermis, Tolnaftate is biotransformed into a number of inactive metabolites.

  4. Excretion: Tolnaftate and its metabolites are mostly excreted by feces, with a small amount also being removed through urine.

Toxicity:

Tolnaftate, when used topically as prescribed, is usually regarded as a low-toxicity, safe medicine. Because of its restricted systemic absorption, there is less chance of major side effects.

Clinical Studies:

The effectiveness and safety of Tolnaftate for treating different fungal infections have been assessed in a number of clinical trials. Usually, Tolnaftate is compared to a placebo or other antifungal drugs in these trials. Among the noteworthy discoveries are:

  • Efficacy: Most studies indicate that Tolnaftate is a useful treatment for mild to severe nail and skin fungal infections. Success rates for various illnesses can range from 60 to 90 percent, depending on the nature of the investigation and particular circumstances.

  • Safety: Tolnaftate seldom causes serious adverse effects, according to clinical research. The most frequent adverse effect is mild discomfort at the application site, which is often controllable by changing the dose or treatment frequency.

What Are the Contraindications of Tolnaftate?

  1. Tolnaftate has several contraindications and is not recommended for everyone, despite its safety profile.

  2. Avoid this medication if having a history of allergies to any of the medication's constituents.

  3. While Tolnaftate is generally thought to be safe, it is better to speak with the doctor before using it for personalized advice based on the unique circumstances.

  4. Tolnaftate may not be effective enough for treating extensive fungal infections. In these situations, speak with the doctor about treatment alternatives.

  5. Some medical disorders, such as liver disease or compromised immune systems, may need special attention or other kinds of therapy. Before using Tolnaftate, talk to the doctor about any past medical conditions.

Warnings and Precautions:

  1. Only for external usage.

  2. If not instructed by a physician, do not use it on children younger than two years old.

  3. Avoid getting this substance in the eyes.

  4. Stop using and see a doctor if irritation develops or if the condition does not improve in four weeks. (within two weeks for jock itch).

  5. Keep out of children's reach. If ingested, get medical attention or get in touch with a poison control center immediately.

  6. Before using, get advice from a medical expert if pregnant or nursing.

  7. Use caution while applying Tolnaftate to open wounds or broken skin as it may exacerbate the condition. For advice on the best way to treat wounds, speak with the doctor.

  8. See the doctor for alternate treatment choices if, after taking Tolnaftate for a fair amount of time, the infection does not get better, becomes worse, or is really serious.

Drug Interactions of Tolnaftate

Because Tolnaftate absorbs very little systemically when administered topically, it generally has no recognized major medication interactions.

Specific Considerations:

  • Reduced Immune Response: Reduced effectiveness, higher chance of serious infection, and possibility of adverse consequences. Before using it, speak with the doctor, and think about other options for therapy.

  • Pregnant and Nursing: Generally safe, but if specific advice is needed or other choices to be considered, speak with the doctor.

  • Children: Lower dosages, careful monitoring, and the possibility of sensitive skin responses. Not appropriate for every illness. Speak with the physician.

  • Seniors: Because of possible medication interactions and skin thinning, start with lesser dosages. Tell the doctor about all of the prescriptions and any underlying medical issues.

  • Vulnerable Population: See the physician before using Tolnaftate. Follow the recommended course of action even if the symptoms get better. Seek medical assistance if an infection gets worse, if side effects are worrying, or if things do not get better.

Dr. Shubadeep Debabrata Sinha
Dr. Shubadeep Debabrata Sinha

Infectious Diseases

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