Mikonafin

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Mikonafin

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Mikonafin

Quick Facts: Mikonafin

Property Description
Active ingredient Terbinafine Hydrochloride
Form Tablet (oral), Cream, Solution, or Gel (topical)
Pharmacological class Allylamine Antifungal Agent
General purpose Clearance of fungal infections
Origin Synthetic compound

What is Mikonafin and What Class of Medicine Does it Belong To?

Mikonafin is a pharmaceutical preparation containing the single active ingredient, Terbinafine Hydrochloride, a highly specialized synthetic compound. This substance is formally classified as a synthetic Allylamine antifungal agent. The Allylamine class is clinically recognized for its efficacy against dermatophytes, which are the primary cause of many superficial skin and nail infections.

This categorization means the product is specifically designed as an antimycotic to target and eliminate pathogenic fungi. Mikonafin is positioned as a prescription-only (Rx) product when supplied in its oral tablet form, reflecting the systemic nature of treatment required for complex, deeply set infections.


General Purpose and Available Forms (Systemic vs. Topical)

The general therapeutic purpose of Mikonafin is the direct clearance of fungal pathogens, achieved primarily through a distinct fungicidal action. The drug is selective in its mechanism, targeting the fungal enzyme squalene epoxidase, which results in fungal cell death.

This medication is available in two fundamental physical forms that determine its use: tablets for oral intake, which provide a systemic effect throughout the body, and topical preparations like creams, solutions, or gels, which concentrate the medication directly on the surface. These different forms are designed for treating various fungal infections, such as those affecting the feet, groin, and body. The topical forms of Terbinafine are often available Over-The-Counter (OTC), supporting its use for localized, superficial skin issues.

Regulatory References

  1. Terbinafine - LiverTox - NIH Bookshelf
  2. Terbinafine (Oral Route) - MedlinePlus

What side effects are possible with Mikonafin?

Possible Side Effects and Safety Information

Official regulatory documents classify the potential adverse effects of Mikonafin into frequency categories and by system-organ class. Very common adverse reactions documented in official product information include gastrointestinal symptoms (such as nausea, diarrhea, dyspepsia, and abdominal pain), headache, rash, urticaria, and musculoskeletal symptoms (arthralgia, myalgia).

Serious adverse reactions are rare but are explicitly noted in regulatory labeling. These include reports of Hepatic Failure, which has sometimes led to liver transplant or death, and severe cutaneous reactions like Stevens-Johnson syndrome (SJS) and Toxic Epidermal Necrolysis (TEN). Rare cases of blood disorders, such as neutropenia and pancytopenia, have also been reported in official post-marketing data.

Population-Specific Safety Constraints

The use of oral Mikonafin is contraindicated by government health authorities for individuals with active or chronic liver disease due to the risk of hepatotoxicity. Furthermore, its use is not recommended in patients with severe renal impairment as the safety in this population has not been adequately studied. The drug must be immediately discontinued if clinical or biochemical signs of liver injury develop. Assessment of liver function tests is recommended before initiating treatment and periodically during therapy.

Time-related safety patterns officially documented include taste disturbance and loss of smell, which, while sometimes transient, have been reported in the labeling as potentially being prolonged or permanent in certain instances.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information describes the overdose profile of Mikonafin (Terbinafine HCl) based on documented cases of acute oral ingestion.


Documented Overdose Manifestations

Reported cases of acute oral overdose, with ingestion levels up to 5 g documented, primarily present with a specific cluster of symptoms. These manifestations are generally concentrated in the gastrointestinal and neurological systems and include nausea, vomiting, epigastric pain (stomach pain), headache, and dizziness. No specific antidote is known for this substance.


Regulator-Mandated Emergency Actions

Official labeling strictly requires immediate action following a known or suspected overdose. Management involves seeking emergency medical attention or contacting a Poison Help line immediately. The mandated procedural approach is focused on eliminating the drug through the use of measures such as activated charcoal and providing necessary symptomatic supportive therapy.

Furthermore, the medication must be immediately discontinued, and hepatic function must be evaluated if symptoms of severe adverse reactions, such as persistent nausea, jaundice, or signs of liver injury, are reported, as these conditions require urgent medical management independent of acute overdose.

Therapeutic Uses of Mikonafin

What Mikonafin Treats: Main Uses and Benefits

Mikonafin is a medication generally focused on providing symptomatic relief across domains where additional symptomatic support is needed, helping patients manage acute and disruptive symptoms during episodes of heightened discomfort. This medication is generally used in areas where short-term symptom management is appropriate, particularly for conditions involving episodic or fluctuating manifestations.


Easing Discomfort and Disruptive Symptoms

Mikonafin is relevant in clinical settings marked by the sudden appearance or escalation of challenging symptoms related to inflammatory or irritative states. It is used for managing distressing manifestations and helps address symptom clusters that may become more disruptive during flare-ups.

This therapeutic application is commonly used across conditions involving episodic manifestations, specifically those associated with discomfort, tension, and noticeable physiological strain. The primary role is to provide supportive relief when symptoms interfere with routine activities, supporting general well-being during symptomatic phases.

“Mikonafin is applied during phases of increased discomfort or tension, and may assist with managing symptom clusters that can become intense or disruptive.”

Quick Fact: Supportive Management for Acute Discomfort

This medication is applied in clinical settings that involve acute or unstable symptom patterns, where short-term symptomatic assistance is needed.

Regulatory References

  1. NIH DailyMed drug label

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Mikonafin?

Eligibility for Mikonafin (oral terbinafine hydrochloride) is strictly governed by authoritative regulatory documents based on the patient's pre-existing health status, organ function, and age.


Category Official Regulatory Status/Rule
Populations for whom use is contraindicated Patients with Chronic or Active Hepatic Disease; individuals with a known hypersensitivity or allergic reaction to oral Terbinafine.
Conditions where use is restricted Renal Impairment (Creatinine Clearance <50 mL/ min); use is not recommended as it has not been adequately studied in this population.
Age-related eligibility rules Use is not established or not recommended in children typically under 4 years of age or below a specific weight (e.g., sim 12 kg); Older Adults may be eligible but require assessment of pre-existing liver/kidney function.
Pregnancy and lactation eligibility Pregnancy: Not generally recommended due to limited clinical data. Lactation: Should not breast-feed as Terbinafine is excreted into human milk.

Official Eligibility Statements

  • Mikonafin is contraindicated in patients with chronic or active hepatic disease.
  • Use is not recommended for patients with renal impairment (CrCl <50 mL/ min).
  • The medicine is not recommended during pregnancy or for mothers who are breastfeeding.
  • Use should be with caution in patients with pre-existing Psoriasis or Lupus Erythematosus.

Regulatory documentation defines non-eligibility primarily through absolute contraindications concerning hepatic disease and hypersensitivity, while classifying use as not recommended for populations with renal impairment or certain reproductive statuses due to insufficient safety data or drug excretion.

What should I know about interactions with other medicines?

Mikonafin can affect the way certain other medicines are processed by the body. This is primarily due to its ability to influence specific liver enzymes, particularly the cytochrome P450 2D6 (CYP2D6) enzyme, leading to changes in the concentration of co-administered drugs.

Products That May Interact

Mechanism of Interaction Interacting Medicine Categories Specific Examples (Official Labeling)
Mikonafin slows metabolism of other drugs Certain antidepressants, beta-blockers, antiarrhythmics, antipsychotics Desipramine, Metoprolol, Codeine, Tramadol
Other drugs alter Mikonafin's clearance Inhibitors or inducers of other CYP enzymes Cimetidine, Rifampin, Fluconazole

Co-administration with medicines that are sensitive CYP2D6 substrates may result in increased exposure to those medicines, potentially requiring a dose adjustment or close monitoring. For example, the metabolism of tricyclic antidepressants like desipramine is significantly decreased when taken with Mikonafin.

Conversely, other medicines can affect how Mikonafin is cleared from the body. For instance, drugs like cimetidine, which inhibit certain liver enzymes, can reduce Mikonafin clearance and increase its concentration. Rifampin, an enzyme inducer, can increase Mikonafin clearance, potentially reducing its effectiveness. It is essential to communicate all currently used prescription, over-the-counter, and supplementary products before starting treatment.

Mechanism of Action

Inhibition of Fungal Sterol Synthesis

The drug's active ingredient, Terbinafine, operates via a dual-action mechanism centered on the fungal cell. The primary action is the non-competitive inhibition of the enzyme Squalene Epoxidase (SQLE), a biological target essential to the fungal metabolic pathway. Blocking SQLE arrests the conversion of squalene, which is necessary for the ergosterol biosynthesis pathway. This molecular event results in a severe deficiency of ergosterol, the primary sterol required for maintaining fungal cell membrane integrity.

Induction of Squalene-Mediated Cytotoxicity

The secondary action arises from the consequential build-up of the precursor substance, squalene, within the fungal cytoplasm and membrane structure. The high concentration of accumulated squalene exerts a direct toxic effect on the fungal cell. This combined mechanistic cascade—structural failure due to ergosterol loss coupled with internal poisoning from squalene—leads to fungal cell lysis. This molecular selectivity, which targets the fungal SQLE over mammalian cholesterol enzymes, produces the fungicidal activity characteristic of this mechanism.

Dosage and Administration Information

Mikonafin is administered through two official routes: Oral (for systemic treatment via tablets or granules) and Topical (for localized treatment via 1% cream, solution, or gel). The exact regimen and duration are strictly determined by the official prescribing information.

Official Dosing and Duration

Administration Route Standard Adult Daily Dose Typical Duration (Oral)
Oral Tablet (250 mg) Once daily Fingernails: 6 weeks
Toenails: 12 weeks
Topical (1% Formulations) Once or twice daily 1 to 4 weeks (for skin infections)

Administration Conditions and Adjustments

Dosing Frequency and Timing The 250 mg oral tablet is generally taken once daily. The tablet may be taken either with or without food. Topical formulations are applied to the affected and surrounding skin after cleaning and drying the area.

Special Population Rules

  • Pediatric Patients: Oral dosing is determined by body weight, with specific doses (125 mg, 187.5 mg, or 250 mg) corresponding to various weight ranges for treating certain infections.
  • Renal Impairment: Use of the oral tablet is not recommended in patients with a creatinine clearance 50 mL/ min, as clearance of the drug is decreased by approximately 50%.

Missed Dose Instructions If a daily oral dose is missed, it should be taken as soon as remembered, unless it is less than four hours before the next scheduled dose, in which case the missed dose should be skipped to prevent taking a double dose.

Recent Clinical Evidence

Research evidence / Overview of Studies for Mikonafin

This section provides an objective overview of the clinical research for Mikonafin (Terbinafine Hydrochloride). Research provides context but not individual predictions; findings describe group patterns, not personal outcomes.


Evidence for Systemic Use in Fungal Nail Infections (Onychomycosis)

The evidence base for the oral tablet form primarily relies on key Randomized Controlled Trials (RCTs) and meta-analyses. Researchers explored specific outcomes related to fungal infections, monitoring Mycological Cure (fungus observed to be absent in the lab) and Clinical Cure (nail appearance). Data show patterns related to mycological cure compared to placebo, and research describes the tracking of patients for up to one year and, in some instances, for several years, to record the long-term status of the infection. Research examining the oral tablet specifically in the pediatric population for nail infections is limited.


Evidence for Topical Use in Skin Infections and Pediatric Focus

The topical formulations (creams, solutions) were evaluated in short-term RCTs focused on localized skin infections (Tinea Pedis, Cruris, and Corporis) in adults and adolescents. These studies tracked Mycological Cure and Clinical Improvement (symptom resolution) over treatment courses lasting one to four weeks. Evidence quality varies across studies, and long-term recurrence data for topical use are limited.

For Tinea Capitis (scalp ringworm), the systemic treatment was observed in comparative RCTs involving children. Findings related to fungal clearance showed dependency on the causative species, and the research base for this specific pediatric indication is more limited than for adult indications.


Research Gaps and Specialized Populations

Dedicated studies explored the use of the oral tablet in specialized groups like the elderly and patients with diabetes, where outcomes reflecting daily functioning were monitored. However, clinical research examining the use of Mikonafin in women who are pregnant or breastfeeding is generally insufficient. Overall, long-term effects are not fully established for all indications, and study results reflect the specific conditions under which they were conducted, meaning results apply only to the populations studied.

Key Studies & References

  1. NIH DailyMed Label: Terbinafine Tablet
  2. Topical treatments for fungal infections of the skin and nails of the foot: a systematic review of the clinical effectiveness and safety of topical agents
  3. Management of Tinea Pedis in Patients with Diabetes Mellitus

Frequently Asked Questions (FAQ)

Common questions about Mikonafin (FAQ)


Q: How long does it typically take before a person might notice initial effects from Mikonafin?

A: The time it takes to see results can vary depending on the site of the infection being treated. For localized skin infections, regulatory sources indicate that symptom improvement may begin within about one week. For oral treatment of fungal nail infections, the full clinical effect is typically not visible until some months after treatment is completed, as time is required for the healthy nail to fully grow out.


Q: How is Mikonafin different from other similar medicines used for the same health issue?

A: Mikonafin's active ingredient, Terbinafine, is classified as an Allylamine antifungal agent, according to official sources. This drug class is primarily recognized for its fungicidal activity, which describes its intended mechanism to eliminate the fungal cells, as defined in official documents. This differs from other antifungal classes that may only work by slowing the growth of the fungus.


Q: Does Mikonafin remain in the body for a noticeable period after the last dose?

A: Following oral intake, regulatory information indicates that the drug substance rapidly diffuses and concentrates in tissues such as the skin, hair, and nails. Where it is present for an extended period. This residual concentration is thought to contribute to the drug's activity in slow-growing tissues like the nails.


Q: Are there any restrictions on food or beverages, including alcohol, while taking Mikonafin?

A: The oral tablets may generally be taken with or without food. Regulatory information states that alcohol may increase the risk of side effects, including the risk of liver issues, which is a key safety concern with Mikonafin. Therefore, any alcohol intake should be discussed with a healthcare professional.


Q: Does Mikonafin interact with common over-the-counter pain relievers or supplements?

A: Authoritative sources indicate that common over-the-counter pain relievers, such as paracetamol (acetaminophen) or ibuprofen, are typically not listed as specific, major contraindications for use with Mikonafin. However, due to the potential for interactions, it is noted in official documentation that a healthcare professional should be aware of all supplements and over-the-counter medicines used.


Q: Are there specific laboratory tests that are generally recommended before or during treatment with Mikonafin?

A: Due to the rare but serious risk of liver issues, official documentation describes the importance of assessing patients for pre-existing liver disease before initiating oral treatment. Assessment of liver function tests is stated to be necessary before initiating therapy and periodically throughout the treatment period.


Q: Is Mikonafin available as a generic version, or is it only available under a brand name?

A: The active ingredient in Mikonafin, Terbinafine, is widely available in generic form for both the oral tablet and topical applications, as indicated in official regulatory and medical listings.


Q: If a side effect like headache or joint pain occurs, is it expected to go away on its own?

A: While regulatory product information lists common side effects like headache or joint pain (arthralgia/myalgia) as very common, it does not specify an exact timeline for their resolution. Official guidance notes that if symptoms become persistent, worsening, or bothersome during the course of treatment, they should be communicated to a healthcare professional.


Q: Can Mikonafin change the appearance of the skin, such as causing discoloration or sensitivity to light?

A: Official information indicates that exposure to natural sunlight and sunlamps should be minimized during oral treatment. This is because the drug can cause unusual photosensitivity (increased sensitivity to light), which may potentially result in a rash or other skin reaction.


Q: Is it possible for the treated condition to recur after the course of Mikonafin is complete?

A: While Mikonafin is intended for clearance, authoritative medical literature indicates that recurrence of fungal nail infection can be commonplace, though rates may vary. Research studies frequently track patients for extended periods after the treatment course to evaluate the long-term status and observe patterns of potential recurrence.


Q: Are there any known situations where Mikonafin may be described as potentially less effective?

A: Clinical evidence has shown that the effectiveness of the oral medication can be influenced by certain factors, such as the degree of nail involvement at the beginning of treatment. Official information indicates the drug may be described as potentially less effective if the full course of therapy, as outlined in the official prescribing information, is not completed.


Q: What is the difference in side effect profiles between the oral and topical forms of Mikonafin?

A: The topical formulations (creams, solutions) are applied locally and are generally associated with only local adverse effects, such as irritation or burning. The oral tablet is associated with the rare risk of more severe systemic effects, including liver failure, severe skin reactions, and changes to blood cell counts, which are not known risks associated with topical use.


Q: Is there an established maximum daily amount of Mikonafin reported in official documents?

A: The standard dose for most adult indications is officially set at 250 mg once daily. While a formal absolute maximum is not stated, official documents addressing accidental overdosage report that cases involving much higher amounts (e.g., up to 5 g) have resulted in non-life-threatening symptoms such as headache, nausea, and dizziness.


Q: What type of organism is Mikonafin designed to act against?

A: Mikonafin is designed to act against a broad spectrum of pathogenic fungi. Regulatory information indicates it is effective against dermatophytes (a common cause of skin and nail infections, such as Trichophyton species) and certain yeasts, including some species of Candida.


Q: What evidence is available regarding Mikonafin's use in individuals with diabetes or other chronic conditions?

A: Authoritative medical literature acknowledges that certain chronic conditions, such as diabetes, can increase the risk of complications from fungal infections. Research has been conducted to examine outcomes in patients with diabetes, and some studies note that factors related to chronic conditions, like diabetes mellitus, have been considered when evaluating recurrence patterns.


Q: What are the signs of a serious allergic reaction to Mikonafin?

A: Official patient information indicates that signs of a serious allergic reaction should be reported promptly to a healthcare professional. These may include difficulty breathing, swelling (especially of the face, lips, tongue, or throat), hives, blistering and peeling of the skin, severe rash, fever, or swollen lymph nodes.


Q: What official resources provide patient information leaflets or guides for Mikonafin?

A: Official patient information leaflets (PILs), medication guides, and drug monographs are made publicly available by national regulatory bodies. Examples include the U.S. National Institutes of Health (DailyMed) and the U.K.’s National Health Service (NHS) via the 'electronic Medicines Compendium' (eMC).

How should Mikonafin be stored and disposed of?

How to Store and Dispose of Mikonafin?

Mikonafin (Terbinafine) must be stored strictly according to regulatory labeling to maintain its stability. The medication must be kept at room temperature, away from excess heat and moisture, and should not be frozen.

To prevent degradation, Mikonafin tablets require protection from light. All formulations must be kept in the container it came in and ensured to be tightly closed until use. Official storage rules dictate that the medicine must be stored out of the sight and reach of children.

For disposal, unused or expired Mikonafin must be handled in accordance with local requirements. Regulatory guidelines specify that the product should not be disposed of via wastewater or household trash.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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