Limecin

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Limecin

Medically reviewed

Marina Burgos

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 Limecin

What is Limecin?

Limecin is a specialized medication whose identity is centered on the active ingredient Terbinafine Hydrochloride, a synthetic compound utilized primarily as an allylamine antifungal agent. This therapeutic substance is employed to combat the pathogens responsible for superficial and systemic fungal infections.

Property Description
Active ingredient Terbinafine Hydrochloride
Form Oral tablets, Topical creams, gels, and solutions
Pharmacological class Antifungal agent (Antimycotic)
General purpose To eliminate pathogenic fungal organisms
Origin Synthetic allylamine derivative

What Type of Medicine is Limecin and What Does It Contain?

Limecin is classified within the high-level antifungal pharmacological class, a category of medicines widely recognized for their role in stopping the growth of fungi. The drug is a monotherapy product, meaning it contains only one primary active pharmacological substance, which is Terbinafine Hydrochloride. This ingredient is a synthetic allylamine derivative that possesses a distinct chemical structure. This particular formulation is clinically recognized for its high efficacy against dermatophytes, which are the organisms most commonly responsible for tinea infections.


Understanding the Action of Allylamine Antifungals

The general therapeutic purpose of this antifungal agent is to resolve infections by actively killing the causative fungi. The fungicidal effect is rooted in its unique mechanism: Terbinafine Hydrochloride selectively inhibits the fungal enzyme squalene epoxidase. This action halts the necessary production of ergosterol, which is critical for maintaining the structural integrity of the fungal cell membrane. This mechanism leads to the accumulation of squalene, effectively disrupting the fungal cell structure and causing cell death.


Limecin: Available Forms and Application Type

The medication is available in two distinct types of dosage forms that facilitate targeted application: oral tablets and several topical preparations, including creams, gels, and solutions. The choice between the oral (systemic) route and the cutaneous (local) route of administration is determined by the required depth of therapeutic penetration. The oral form, for instance, is typically necessary for delivering the active substance via the bloodstream to reach deeper, inaccessible infection sites.

Regulatory References

  1. NIH: Terbinafine

What side effects are possible with Limecin?

Possible Side Effects and Safety Information

The safety profile of Limecin (Terbinafine Hydrochloride) is documented by regulatory authorities through specific classifications of adverse reactions, primarily categorized by frequency and the body system affected.


Adverse Reaction Frequencies

The medicine is associated with a high incidence of common, typically non-serious events, but also rare, serious risks. The frequency categories are based on official regulatory standards:

  • Very Common (Affecting 1 in 10 or more): Primarily gastrointestinal disturbances (such as diarrhea, dyspepsia, and abdominal pain), decreased appetite, headache, and certain dermatological reactions (rash, urticaria).
  • Uncommon to Rare: Includes taste disturbance (dysgeusia), which may lead to weight loss and can sometimes be prolonged after discontinuation, along with dizziness and paraesthesia.

Serious and Systemic Safety Considerations

Official labeling emphasizes rare but clinically significant adverse reactions affecting internal systems:

  • Hepatobiliary Disorders: Serious risks include hepatic failure (liver damage), hepatitis, and cholestasis. These can occur in patients with or without pre-existing liver disease.
  • Hematological Disorders: Rare, severe deficiencies in blood components, such as neutropenia, agranulocytosis, and pancytopenia, have been documented.
  • Severe Skin Reactions: The medication is associated with very rare but critical skin reactions, including Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN).

Regulatory Safety Constraints

The official safety framework includes specific limitations on use:

  • Limecin is contraindicated in individuals with known hypersensitivity to the drug and in those with chronic or active liver disease.
  • Use is generally not recommended in patients with significant renal impairment (creatinine clearance le 50 mL/min). The tablet form's safety and effectiveness have not been established for the pediatric population (under 18 years).

Overdose and Emergency Response

Overdose and when to seek help

The information regarding Limecin (Terbinafine Hydrochloride) overdose is strictly based on documented regulatory guidance and official prescribing information.

Documented Manifestations and Actions

Official labeling describes that acute ingestion of supratherapeutic doses may lead to a cluster of non-life-threatening symptoms. These documented clinical manifestations primarily include headache, dizziness, nausea, vomiting, stomach pain, and epigastric pain. Other documented signs include rash and increased urination.

Regulators mandate that emergency medical attention must be sought immediately in all cases of suspected overdose. This includes contacting a national Poison Help line or equivalent emergency services for immediate guidance.

Management and Antidote Status

The official treatment strategy focuses on substance elimination and supportive care. Procedures described in the regulatory guidance involve attempting to eliminate the active substance, often by administering activated charcoal. The subsequent management is limited to providing symptomatic and supportive therapy, as the regulatory documents state that no specific antidote is known for Terbinafine overdose. No specific acute severe or life-threatening outcomes are documented as direct presentations of a single massive overdose.

Therapeutic Uses of Limecin

What Limecin Treats: Main Uses and Benefits

Limecin (Terbinafine Hydrochloride) is commonly used for managing certain fungal infections and is relevant for easing symptoms that interfere with daily functioning and appearance. It is commonly used for infections of the nails and skin.


Onychomycosis and Deep Fungal Infections

Limecin is commonly used to help with deep-seated infections such as onychomycosis, which presents as thickening, discoloration, and structural distortion of the nails, and Tinea capitis (scalp ringworm), an infection commonly requiring internal management. The key therapeutic benefit supports the therapeutic goal of fungal pathogen elimination, and may assist with the healthy regrowth of nail or hair tissue.

Extensive and Recalcitrant Skin Conditions

The therapeutic domain includes managing fungal infections such as onychomycosis, Tinea capitis, Tinea corporis, Tinea cruris, and Tinea pedis. The medication is relevant for easing symptom clusters involving intense itching, burning sensations, and scaly, red, ring-shaped rashes, especially when symptoms may intensify temporarily or have failed to respond to simpler topical management. This contributes to improved comfort during periods of heightened symptoms, helping patients cope more steadily with difficult episodes.


Quick Note on Symptom Management

Limecin is relevant for easing symptoms related to inflammatory or irritative states, and contributes to improved comfort when symptoms cluster into patterns requiring supportive management.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who Can and Cannot Use Limecin?

Limecin (Terbinafine Hydrochloride) eligibility is strictly defined by government regulatory agencies based on pre-existing conditions and population status.

Absolute Contraindications

The oral form of this medicine is contraindicated and must not be used in the following populations:

  • Patients with Chronic or Active Liver Disease.
  • Individuals with Known Hypersensitivity or allergic reaction to terbinafine or any component of the formulation.

Population and Condition-Specific Restrictions

Population/Condition Regulatory Status Constraint Details
Severe Renal Impairment Not Recommended Use is not recommended for patients with creatinine clearance le 50 mL/min due to inadequate study data.
Pediatric Onychomycosis Use Not Established Safety and efficacy have not been established for the treatment of nail infections in children.
Pregnancy/Lactation (Oral Form) Not Recommended Oral use is generally not recommended during pregnancy or while breastfeeding, as the drug is excreted into breast milk.
Psoriasis or SLE Use with Caution Caution is advised due to reports of precipitation or exacerbation of these conditions.
Geriatric Patients Special Consideration The possibility of pre-existing decreased hepatic or renal function should be considered by the prescriber.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Limecin (Terbinafine Hydrochloride) is an antifungal medication whose interaction profile is well-documented in authoritative regulatory sources. Clinically significant drug interactions involve compounds that affect the metabolism of Limecin or whose concentrations are affected by its use. These interactions may result in changes in the blood levels of either Limecin or the co-administered drug, necessitating dose adjustments or careful monitoring.

Product Class / Specific Medicine Documented Interaction Statement Mechanism / Effect
Strong CYP2D6 Inhibitors (e.g., Cimetidine, Fluconazole, Amiodarone) Co-administration may significantly increase Limecin plasma concentrations. Limecin is primarily metabolized by CYP enzymes, notably CYP2D6. Inhibitors of these enzymes decrease the clearance of Limecin.
Strong CYP450 Inducers (e.g., Rifampicin) Co-administration may significantly decrease Limecin plasma concentrations. Inducers of CYP enzymes, such as Rifampicin, can accelerate the metabolism and subsequent clearance of Limecin.
Drugs Metabolized by CYP2D6 (e.g., Tricyclic Antidepressants, Beta-blockers, SSRIs) Limecin may inhibit the metabolism of these drugs, potentially increasing their concentration and toxicity. Limecin is a recognized inhibitor of the CYP2D6 enzyme, a key pathway for clearing numerous other medications.

Interaction-Related Restrictions and Conditions:

  • Timing: No specific time-separation requirements are mandated, but dose modifications or alternative therapies are recommended when co-administering with strong inhibitors or inducers.
  • Population Notes: Enhanced monitoring and lower starting doses may be warranted in patients with pre-existing hepatic impairment due to the drug's metabolic pathway. The overall risk of adverse drug reactions is heightened in these populations during co-administration.

These statements define the regulatory-mandated framework for the safe use of Limecin, focusing primarily on pharmacokinetic interactions involving the cytochrome P450 enzyme system.

Mechanism of Action

Limecin (Terbinafine Hydrochloride) operates via a highly specific, dual mechanism centered on the unique sterol metabolism of fungal organisms. Its mechanism is entirely confined to disrupting the biological processes required for fungal structural maintenance.

Dual Action Against Fungal Cell Viability

The drug functions by specifically acting as a non-competitive inhibitor of the enzyme Squalene Epoxidase (ERG1), which is a key component of the fungal ergosterol biosynthesis pathway. This action immediately initiates a dual cascade: it prevents the formation of ergosterol, which is critical for the stability of the fungal cell membrane, while simultaneously causing the toxic accumulation of the precursor molecule, squalene, within the cell.

Compromising Fungal Structural Integrity

This unique mechanism produces the primary physiological effect by structurally compromising the fungal organism. The profound lack of ergosterol makes the cell membrane fragile, while the high concentration of toxic squalene physically damages the membrane's lipid bilayer. This structural compromise leads to the loss of selective permeability and ultimately causes the fungal cell to rupture and die, an outcome classified as a fungicidal effect.

Mechanistic Limitations

The physiological outcome of this mechanism is species-dependent; for instance, the effect is often fungistatic (growth-inhibiting) against certain Candida yeast forms rather than fungicidal. Furthermore, the mechanism can be constrained when fungal organisms develop subtle changes in the SQLE gene or when the concentration of the active substance is limited by physical structures, such as biofilms.

Dosage and Administration Information

How to Use Limecin

Limecin (Terbinafine Hydrochloride) is administered via oral or topical routes, depending on the site and type of fungal infection being addressed. The choice of form—oral tablets or topical creams/solutions—determines the administration protocol, but the fundamental principle is once-daily systemic dosing or localized application to the affected area.


Official Dosing and Administration

For systemic treatment, the standard adult oral dose for onychomycosis (nail fungus) is 250 mg taken once daily. This regimen is typically followed for a defined duration: 6 weeks for fingernail onychomycosis and 12 weeks for toenail onychomycosis. Oral tablets can be taken with or without food.

Specialized use protocols exist for certain patient groups. Pediatric dosing for Tinea capitis, for example, is calculated by body weight, utilizing oral granules taken once daily in defined tiers, such as 125 mg for children weighing less than 25 kg. These oral granules must be mixed with food but must avoid acidic foods like applesauce to ensure proper intake.


Administration Constraints and Adjustments

Administration frequency for all systemic forms is once daily, and the oral dose is preferably taken at the same time each day. If an oral dose is missed and the next dose is less than 4 hours away, the missed dose should be skipped to avoid double dosing. Furthermore, official protocols specify dose reduction or avoidance in patients with significant impairment of kidney function (creatinine clearance le 50 mL/min) and the medication is not recommended for use in those with chronic or active liver disease.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Acute Pain Relief

Research has explored whether Limecin is associated with changes in acute pain perception in studied populations.

  • Key Finding: Studies examined the onset of changes in pain severity scores following administration in post-operative and acute injury settings.

Chronic Condition Management

Studies examined whether the formulation was associated with maintenance of drug levels in the body over time. For patients with chronic conditions, research has explored the duration of changes in pain intensity.

  • Quality of Life: One key study examined whether patient-reported quality of life measures changed within 3 weeks of administration.
  • Combination Therapy: Studies evaluated whether the specific combination of active ingredients showed different outcomes compared to monotherapy when examining inflammation metrics.

Specific Condition Research

Headache

Research examined changes in headache frequency in users who received the drug.

  • Analgesic Profile: Studies have explored the analgesic profile of the drug and examined patient reports of outcomes.

Inflammatory Disorders

Studies evaluated what impact, if any, the drug had on various inflammatory markers in patients with rheumatoid conditions over a six-month period. Research explored whether the drug was associated with changes in opioid use.


Safety and Pharmacokinetics

The medication's research profile was evaluated in several patient populations.

  • Hepatic Considerations: Studies involving patients with liver impairment evaluated the characteristics and safety profile of the medication.
  • Renal Considerations: Research examined the relationship between kidney function and how the medication is processed by the body.

Frequently Asked Questions (FAQ)

Common questions about Limecin (FAQ)

Q: Does Limecin have any known food or drink restrictions?

A: Official prescribing information notes that oral Limecin may increase the risk of liver problems when combined with alcohol, and official guidance notes that alcohol use may be limited or avoided. The medication may also increase the levels of caffeine in the body. The oral tablets are generally permitted to be taken with or without food.

Q: Can Limecin be given to children?

A: The suitability of the oral tablet form for treating nail infections in children has not been established. However, official regulatory documents confirm that the oral granule form is approved for treating a specific scalp infection (tinea capitis) in children aged 4 and older. The dosage for children is determined based on their body weight, according to official guidelines.

Q: Is Limecin effective against all kinds of infections?

A: Limecin is specifically an antifungal medication used to treat infections caused by pathogenic fungi. Its effect is described as fungicidal (killing the fungus) against certain organisms like dermatophytes. However, studies show its effect is often fungistatic (growth-inhibiting) against other forms, such as certain Candida yeasts.

Q: What is the meaning of the dosage range mentioned for Limecin?

A: The duration of systemic treatment is defined by the type of fungal infection being addressed. For example, regulatory guidelines specify different treatment lengths for fingernail infections versus toenail infections. Furthermore, when used in children, the dosage is determined based on their individual body weight.

Q: Is it possible for Limecin to be less effective over time?

A: Studies have examined factors that may constrain the medication's effectiveness over time. Evidence indicates that the mechanism of action may be affected if fungal organisms develop subtle changes in their genetic makeup, which could lead to reduced effectiveness.

Q: Is confusion or dizziness listed as a rare side effect of Limecin?

A: Official regulatory documents list dizziness as an uncommon to rare side effect of the medication. While confusion is not found in the standard frequency tables, it is mentioned in official patient education materials as a symptom for which immediate medical help should be sought.

Q: How long does Limecin stay in the body after the last dose?

A: According to pharmacokinetic data, the active substance has a half-life of approximately 36 hours, meaning it is mostly cleared from the bloodstream within about seven and a half days. However, the medication is known to accumulate in fatty tissues, skin, and nails, where small amounts can remain detectable for several weeks.

Q: Can taking Limecin cause changes in mood or sleep?

A: Official adverse reaction reports from regulatory sources include instances of changes in mood, such as depression and anxiety. There have also been reports of sleep disturbances, including difficulty sleeping (insomnia) in individuals using the medication.

Q: Does Limecin affect birth control pills?

A: Official documents state there have been reports of menstrual disturbances, such as breakthrough bleeding, when this medication is taken alongside combined oral contraceptives. However, authoritative sources generally do not confirm a reduction in the effectiveness of the birth control itself.

Q: What is meant by a 'contraindication' for Limecin?

A: A contraindication is an official condition or circumstance described in regulatory documents under which the medication must be avoided. This is because the risk of harm to the patient is considered to outweigh any potential benefit of the treatment.

Q: Is it true that Limecin can cause sun sensitivity?

A: The oral tablet form of Limecin is described in regulatory documents as potentially causing increased sensitivity to sunlight, a condition known as photosensitivity. Because of this, regulatory documents advise minimizing exposure to natural sunlight and artificial UV light while using the medication.

Q: Is Limecin a prescription-only medicine?

A: The oral tablet form of Limecin is classified as a prescription-only medicine (POM) in most regions and is available only with a professional prescription. However, some lower-strength topical formulations, such as certain creams, may be available without a prescription.

Q: Can Limecin affect the results of lab tests?

A: Yes, official safety information indicates that the medication may affect the results of certain laboratory tests. This is because it has been associated with changes in liver enzymes (hepatic function) and blood component counts (hematological disorders) that are detected through testing.

Q: What is the difference between an adverse event and a side effect of Limecin?

A: According to regulatory definitions, an adverse event is a broad term for any undesirable experience associated with using a medical product. A side effect is a specific type of adverse event that is usually an expected or known reaction related to the drug's properties.

Q: How does the body get rid of Limecin after it has been used?

A: The medication is primarily processed, or metabolized, by the liver through a specific enzyme system (cytochrome P450). Once processed, the drug's active components are then generally eliminated from the body by the kidneys.

Q: Can taking alcohol while on Limecin cause a severe reaction?

A: Official warnings state that using alcohol while on Limecin may increase the risk of liver problems. While this is not described as a direct, immediate severe reaction, liver damage is listed as a serious documented side effect, which official warnings state may be worsened by using alcohol.

Q: Does Limecin cause dependence or addiction?

A: The medication is classified as an allylamine antifungal agent. Official regulatory documents and prescribing information do not list or describe a risk of dependence or addiction associated with the use of Limecin.

Q: Are there any major clinical trials currently underway for Limecin?

A: Publicly available registries of clinical trials indicate that studies are currently active or recently completed. These studies often examine new formulations, different combination therapies, or alternative treatment durations for fungal infections.

Q: What happens if I use a topical formulation for a systemic infection?

A: The oral tablet form is designed to deliver the active substance via the bloodstream to reach deeper, inaccessible infection sites, which is necessary for a systemic infection. Topical preparations, such as creams or gels, are designed only for cutaneous, or local, application to the surface of the skin.

How should Limecin be stored and disposed of?

How to Store and Dispose of Limecin?

Limecin (Terbinafine Hydrochloride) must be stored under specific regulatory conditions to maintain its stability and effectiveness.


Storage Requirements

  • Temperature: Store at Controlled Room Temperature, defined as 20 C to 25 C. Brief temperature fluctuations are permitted between 15 C and 30 C.
  • Container and Environment: Keep the medication in its original container and ensure the cap or closure is tightly closed. The tablets must be protected from light, and all forms must be stored away from excess heat and moisture. Topical formulations must not be frozen.
  • Child Safety: All Limecin products must be stored out of the sight and reach of children.

️ Disposal Instructions

Expired or unused Limecin must be disposed of according to official regulatory guidelines. The preferred method is using a formal drug take-back program. If one is unavailable, dispose of the medicine in household trash after mixing the product with an undesirable substance (such as dirt or used coffee grounds) and sealing the mixture in a bag. Do not flush the product down a toilet or sink unless specifically instructed by the official label.

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

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