Fungilac

Amorolfine

Treatment option:

Medically reviewed

Last updated on 22/12/2025

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 Fungilac

What is Fungilac? (Overview)

Fungilac is a specialized medication defined by its single active ingredient, Amorolfine, designed for the localized management of fungal infections. It is applied topically and is chemically classified as a synthetic morpholine derivative with potent antifungal properties.

Property	Description
Active ingredient	Amorolfine (hydrochloride)
Form	Medicated nail lacquer (Topical solution)
Pharmacological class	Antifungal agent (Antimycotic)
General use	To combat fungal pathogens in nail tissue
Origin	Synthetic derivative

Fungilac: Definition and Pharmacological Classification

Fungilac is fundamentally an antifungal agent belonging to the chemical group of synthetic morpholine derivatives. The preparation acts as a monotherapy, focusing entirely on the efficacy of the Amorolfine compound to achieve its therapeutic effect against a range of fungal pathogens, including dermatophytes, yeasts, and molds. Pharmacological studies have consistently supported Amorolfine’s classification as a powerful agent against these common fungal strains, often used in cases where the infection has not yet spread widely.

Composition and Specialized Dosage Form

This medicine is formulated as a medicated nail lacquer, which is a highly specialized dosage form designed for the topical administration of the active ingredient directly onto the nail surface. This specialized form is essential for delivering the compound through the dense, protective keratin layer, a feature that distinguishes it from antifungal creams or powders intended for skin application.

The lacquer utilizes a film-forming base that incorporates solvents, allowing the liquid to dry into a thin, durable film. This solidified film acts as a persistent drug reservoir, ensuring the continuous diffusion of Amorolfine hydrochloride into the nail over time, maximizing the local concentration of the active agent at the infection site.

General Purpose and Mechanism Summary

The primary purpose of Fungilac is to halt the growth and persistence of fungal pathogens within the nail structure. Amorolfine achieves this by disrupting the fungal cell barrier, a function critical for the organism's survival. The compound prevents the synthesis of ergosterol, an essential component of the fungal cell membrane, leading to an effect that is considered both fungistatic (stopping growth) and fungicidal (killing the fungus). Amorolfine’s mechanism of action involves interfering with sterol biosynthesis in the fungal membrane.

Regulatory References

European Medicines Agency (EMA)

What side effects are possible with Fungilac?

Possible Side Effects and Safety Information

Regulatory documents categorize the possible side effects of Fungilac (amorolfine 5% w/v medicated nail lacquer) by frequency and affected body system. The adverse reactions documented are generally localized to the application site.

Adverse Reactions by Frequency and System-Organ Class

System Organ Class	Frequency (ICH Classification)	Examples of Documented Reactions
Skin and Subcutaneous Tissue Disorders	Rare (1 to 10 users in 10,000)	Nail disorders (e.g., discoloration), onychoclasis (broken nails), onychorrhexis (brittle nails)
Skin and Subcutaneous Tissue Disorders	Very Rare (fewer than 1 user in 10,000)	Skin burning sensation
Immune System Disorders	Unknown Frequency (Post-marketing)	Hypersensitivity (systemic allergic reaction), Erythema, Pruritus, Contact dermatitis, Urticaria

Safety Restrictions and Limitations

Contraindications: This medicine is contraindicated in individuals with a known hypersensitivity (allergy) to amorolfine or any of the product’s excipients (inactive ingredients).
Serious Allergic Reactions: Documented instances of systemic allergic reactions (hypersensitivity) have occurred in the post-marketing setting. Such events, while rare, necessitate immediate removal of the product and urgent medical consultation.
Pregnancy and Lactation: Official regulatory labeling notes that human experience with amorolfine use during pregnancy and/or lactation is limited. Due to the unknown potential risk, use in these specific populations should be avoided unless considered clearly necessary by a healthcare professional.
Topical Use Context: Given its topical application as a nail lacquer, the systemic absorption of the active ingredient is officially regarded as very low. Systemic signs of overdose are not expected following correct topical use.

These safety classifications and restrictions define the official risk profile of the medicine, which is characterized by rare, localized application-site events and specific limitations related to allergies and lack of data in vulnerable populations.

Overdose and Emergency Response

Overdose and When to Seek Help

If you suspect an overdose of Fungilac (terbinafine), you must seek emergency medical assistance immediately. An overdose may occur with the accidental or intentional ingestion of a dose significantly higher than the prescribed amount. Although clinical data on large acute overdoses are limited, symptoms are typically gastrointestinal and may include nausea, vomiting, and abdominal pain. Other signs that have been reported include headache, dizziness, rash, and increased urination.

Management of a Fungilac overdose is generally supportive and aimed at removing the unabsorbed drug from the gastrointestinal tract, often through the use of activated charcoal. Medical professionals will monitor vital signs and manage symptoms as necessary.

When to Seek Immediate Medical Attention

Suspected Overdose: Contact emergency services or a poison control center right away if you or someone else has taken more than the recommended dose, even if no symptoms are present.
Severe Symptoms: Seek immediate emergency care for any signs of a severe allergic reaction (e.g., hives, facial swelling, difficulty breathing) or symptoms indicative of serious liver injury, such as persistent nausea, dark urine, pale stools, or jaundice (yellowing of the skin or eyes).

Therapeutic Uses of Fungilac

What Fungilac Treats: Main Uses and Benefits

Fungilac is commonly used for managing symptoms associated with mild to moderate onychomycosis, a chronic fungal infection. It is applied when conditions involve fungal organisms (such as dermatophytes and yeasts), which supports the growth of healthy nail tissue. This application is considered relevant for infections confined to the nail.

Reversing Aesthetic and Structural Nail Damage

This treatment helps address the physical symptoms of the infection, including nail thickening, discoloration (yellowing or browning), brittleness, and splitting. It supports the growth of a new nail that assists with improving the nail's appearance and structural stability, which contributes to easing the overall symptom load.

“Supports the growth of a new nail that assists with improving the nail's appearance and structural stability.”

Common Symptom Addressed: Nail Discoloration

Fungilac is commonly used to help with infections that are localized and typically mild to moderate. This is commonly used in contexts where localized application is appropriate, providing support for patients who may need to manage their disease without requiring a systemic approach. Fungilac is relevant for managing the symptoms of the fungal condition and may assist with minimizing the risk of its spread.

Eligibility and Restrictions for Use

Fungilac (which contains amorolfine or ciclopirox depending on the formulation) is primarily used for the topical treatment of fungal nail infections (onychomycosis). Its use is generally intended for adults.

Who Can Use Fungilac

Patient Group	Indication
Immunocompetent Adults	Mild to moderate onychomycosis, often when the infection affects less than two-thirds of the nail surface and does not involve the lunula (the white crescent near the base).

Who Should NOT Use Fungilac (Contraindications)

Consult a healthcare professional for guidance, as certain conditions or characteristics may prevent or limit the use of this medication.

Hypersensitivity: Individuals with a known or suspected allergy to the active ingredient (amorolfine or ciclopirox) or any other components of the product should not use it.
Pregnancy and Breastfeeding: Due to limited data on its safety during these periods, use is generally avoided or only recommended if the potential benefit justifies the risk, as determined by a physician.
Specific Health Conditions: Patients with conditions such as diabetes, peripheral vascular disease, or a weakened immune system (immunocompromised) may require systemic (oral) antifungal therapy instead of or in addition to a topical product. The risk of trimming infected nails should also be considered in those with diabetic neuropathy.

Topical formulations are not intended for ophthalmic, oral, or intravaginal use.

What should I know about interactions with other medicines?

The official regulatory interaction profile for Fungilac (Amorolfine) is determined by its localized, topical application, which results in negligible systemic exposure of the active substance. Because of this pharmacological profile, regulatory documents across various national health authorities confirm that no formal interaction studies have been performed with other systemic medicinal products.

Systemic Drug-Drug Interactions

Due to the absence of documented interaction studies, official labeling does not contain information on systemic interactions involving metabolic pathways (such as CYP enzymes), drug transporters, or pharmacodynamic additive effects. This means that no specific systemic medicinal products are classified as contraindicated with Fungilac, and no official requirements are established for timing separation with oral or injectable medicines. Furthermore, the labeling contains no documented restrictions or warnings concerning interactions with food, alcohol, herbal products, or supplements.

Topical Co-administration Restrictions

The only official constraints documented in regulatory labeling relate to topical co-administration restrictions necessary to preserve the effectiveness of the nail lacquer. These constraints prohibit the use of cosmetic nail lacquer and artificial nails on the treated nail, as these substances could interfere with the continuous diffusion of the active ingredient into the nail structure.

Mechanism of Action

The drug, Fungilac, operates at the molecular level by altering essential structures and functions of the fungal cell. The mechanism-of-action involves three key mechanistic domains.

Inhibition of Ergosterol Biosynthesis

This core action involves the inhibition of the enzyme lanosterol 14-alpha-demethylase within the fungal metabolic system. This disruption prevents the formation of ergosterol, an essential component of the fungal cell membrane, resulting in altered membrane composition due to the accumulation of toxic sterol precursors.

Compromise of Fungal Cell Membrane Integrity

The ergosterol depletion leads to the structural and functional breakdown of the fungal membrane. This mechanism increases membrane permeability and results in the leakage of vital cellular contents. The resulting loss of internal homeostasis is consistent with the inhibition of fungal growth or cell death.

Interference with Cellular Defense and Efflux

Fungilac may also influence drug retention within the fungal cell by modulating the fungal cell's defense mechanisms, potentially through interference with efflux pump activity. By limiting the active expulsion of the compound, this supports an elevated intracellular concentration, which links the efflux mechanism to the overall antifungal effect.

Dosage and Administration Information

Application Instructions for Fungilac (Amorolfine 5% Nail Lacquer)

Fungilac, which contains the active ingredient amorolfine, is a topical antifungal nail lacquer intended for the treatment of onychomycosis, a fungal infection of the fingernails and toenails. The medication is typically applied once or twice weekly, with the full duration of treatment often lasting six months for fingernails and nine to twelve months for toenails, depending on the infection's severity and the rate of new, healthy nail growth.

Preparation and Application Steps

Step	Action	Detail
1. File	Gently file the affected nail surface.	Prior to the first application, and then as necessary, use a nail file to remove as much of the infected nail material as possible. Use a separate file for each affected nail to prevent infection spread.
2. Clean	Use a cleansing swab to clean the nail.	Wipe the filed nail surface with a provided swab (or an alcohol-based cleanser) to remove lacquer residue and debris. Repeat for each affected nail.
3. Apply	Coat the entire nail surface.	Dip the applicator into the bottle and apply the lacquer evenly over the entire surface of the affected nail. Allow the treated nail to dry for approximately three minutes.
4. Maintain	Clean the applicator and close the bottle tightly.	Clean the reusable applicator thoroughly with the same swab used for nail cleansing. The lacquer is unaffected by soap and water once dry. Wear rubber gloves when handling organic solvents (e.g., paint thinner) to protect the lacquer.

It is crucial to continue the treatment without interruption until the infection has fully cleared and healthy nail has grown back. Do not use artificial nails while undergoing treatment. Cosmetic nail varnish may be applied, but the old varnish must be removed before the next Fungilac application.

Recent Clinical Evidence

Fungilac (Terbinafine): Recent Clinical Evidence

Recent clinical studies and systematic reviews consistently support oral Fungilac (terbinafine) as a highly effective, first-line treatment for onychomycosis (nail fungus) caused by dermatophytes.

Efficacy and Cure Rates

Clinical trial data, including findings from Cochrane reviews and large-scale meta-analyses, show that oral terbinafine is generally more effective than other common oral azole antifungals for achieving both mycological and complete cure of toenail infections. Mycological cure is defined as a negative fungal culture and microscopy, while complete cure also requires a normal-appearing nail. Key findings include:

Higher Cure Rate: Terbinafine has demonstrated superior rates of both mycological and clinical cure compared to other common oral agents.
Treatment Duration: The standard treatment course for toenail onychomycosis is typically 12 weeks, and 6 weeks for fingernail infections, due to the drug's accumulation in the nail plate. Longer courses may be needed for severe or difficult-to-treat cases.

Safety and Monitoring

Oral Fungilac is generally well-tolerated, with most reported adverse effects being mild and transient, such as headache, gastrointestinal symptoms, and skin rash. However, authoritative sources emphasize the need for caution regarding potential side effects:

Hepatic Monitoring: While rare, serious liver injury has been reported. The U.S. Food and Drug Administration (FDA) and other bodies recommend measuring serum transaminase levels (liver enzymes) before initiating oral terbinafine therapy. Subsequent monitoring may be at the clinician's discretion, especially for immunocompromised patients or those with existing liver conditions.
Drug Interactions: Terbinafine is known to inhibit the enzyme CYP2D6, which is involved in metabolizing several other medications. Monitoring for potential drug-drug interactions is necessary, particularly with tricyclic antidepressants, selective serotonin reuptake inhibitors, and beta-blockers.

Emerging Research

Beyond the established oral formulation, current research is exploring new topical formulations, such as high-concentration solutions and gels utilizing nanostructured lipid carriers (NLCs). These topical approaches aim to improve drug penetration into the nail while reducing systemic exposure and the risk of adverse effects, offering a potential option for patients with mild-to-moderate disease or those who cannot tolerate oral therapy.

Key Studies & References

Frequently Asked Questions (FAQ)

Common questions about Fungilac (FAQ)

Q: Can I stop taking Fungilac once my symptoms improve?

Stopping any prescribed medication should always be discussed with a healthcare provider first. Discontinuing treatment early, even if symptoms seem to resolve, may increase the likelihood of the infection returning, depending on the specific condition being treated.

Q: How should I handle a missed dose of Fungilac?

If a dose is missed, it should generally be taken as soon as the patient remembers, unless it is close to the time for the next scheduled dose. The official prescribing information advises against taking two doses at once to make up for a missed dose. Specific guidance on missed doses should be confirmed with the prescribing healthcare provider.

Q: Does Fungilac interact with other medications?

Fungilac, like many medications, may interact with certain other prescription drugs, over-the-counter products, and supplements. The product label typically highlights specific classes of drugs that require dose adjustment or may be contraindicated. It is essential to provide a healthcare provider and pharmacist with a complete list of all products currently being taken to identify potential interactions.

How should Fungilac be stored and disposed of?

How to Store and Dispose of Fungilac (Amorolfine Nail Lacquer)

Storage Requirements

Fungilac must be stored under specific conditions to maintain its stability. The product requires storage below 30°C and must be protected from heat. To prevent the evaporation of volatile components, the bottle must be kept tightly closed after use.

Storage Restriction	Requirement
Temperature	Store below 30°C and protect from heat.
Container	Keep the bottle tightly closed after use.
Safety	Keep this medicine out of the sight and reach of children.

Disposal Instructions

Do not use the medicine after the stated expiry date. Unused or expired Fungilac must not be thrown away via wastewater or household waste. Patients should ask their pharmacist how to properly discard any unused medicine in accordance with local environmental requirements.

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

Available in countries:

Croatia (Hrvatska)

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