Allifort

Quick links to important sections

Allifort

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 Allifort

Property Description
Active ingredient Terbinafine Hydrochloride
Form Oral tablets, Topical cream/gel/spray/solution
Pharmacological class Allylamine Antifungal
Common use Fungal infections (high-level purpose)
Origin Synthetic

Defining Allifort: Identity and Pharmacological Class

Allifort is a synthetic medicinal product identified by its active ingredient, Terbinafine Hydrochloride, and is formally classified as an Allylamine Antifungal agent. This medication is fundamentally a single-ingredient product whose general purpose is to directly combat and eliminate pathogenic fungal organisms in the body. The compound is a derivative of allylamine, a chemical family that acts on the fungal cell structure through a specific biochemical pathway for its action against dermatophytes.

Composition, Origin, and Available Forms

As a synthetic compound, Allifort is manufactured in diverse dosage forms tailored to different needs, including an oral tablet for internal or systemic absorption, as well as various topical preparations such as cream, gel, spray, or solution, designed for direct external application to the skin. This versatility is crucial, as oral formulations are often necessary for nail infections, while topical forms are suitable for localized conditions like athlete's foot. The drug is utilized in both oral and topical applications, reflecting its versatility in administration.

General Purpose of the Allylamine Antifungal

The general purpose of Allifort is to clear the body of pathogenic fungi, particularly the dermatophytes responsible for infections of the skin and nails. The drug achieves its goal by initiating a potent fungicidal action, meaning it is specifically designed to kill the fungal cells directly. Its activity is focused on the cell membrane, which leads to cell death rather than simply slowing growth. This characteristic is achieved by blocking the enzyme squalene epoxidase, thereby causing disruption to the fungal cell membrane and providing a therapeutic response.

Regulatory References

  1. FDA label for Terbinafine Tablets (oral)
  2. DailyMed: Terbinafine

What side effects are possible with Allifort?

Possible Side Effects and Safety Information: Allifort

This section outlines the officially documented safety findings and adverse reactions for Allifort (based on regulatory data for elexacaftor/tezacaftor/deutivacaftor).

Serious Adverse Reactions and Safety Warnings

Regulatory authorities have issued warnings regarding the potential for Drug-Induced Liver Injury and Liver Failure, which have included fatal cases. Other serious reactions documented include Hypersensitivity Reactions (such as anaphylaxis) and Intracranial Hypertension (elevated pressure around the brain).

Common Adverse Reactions

Adverse reactions reported at a frequency of 5% or more in clinical trials and exceeding the rate of a previous combination drug include cough, nasopharyngitis (common cold), upper respiratory tract infection, headache, fatigue, and rash. Laboratory abnormalities frequently noted are increases in liver enzymes (Alanine Aminotransferase and Aspartate Aminotransferase).

Safety Restrictions and Monitoring

Treatment with Allifort is contraindicated in patients with severe hepatic impairment (Child-Pugh Class C). Caution and dosage adjustment are required in moderate hepatic impairment. Due to the risk of increased drug exposure and adverse reactions, strong or moderate inhibitors of the CYP3A enzyme must be avoided or require dosage modification, and grapefruit products should not be consumed. Treatment requires mandated monitoring, including regular liver function tests (blood work) and ophthalmological examinations for pediatric patients due to the reported risk of cataracts.

Population-Specific Considerations

Pediatric patients may require baseline and routine follow-up eye exams. Treatment interruption and prompt medical evaluation are regulatory requirements if signs of liver injury or intracranial hypertension are suspected.

Overdose and Emergency Response

Allifort Overdose and When to Seek Help

The following information is derived from the Overdosage section of official regulatory drug labels, defining the documented clinical profile and required emergency actions.

Documented Overdose Manifestations

Overdosage of Allifort has been associated with specific clinical and physiological signs. Documented manifestations may include excessive sedation, vertigo, or tachycardia, and in some cases, specific laboratory abnormalities such as elevated liver enzymes. Severe, life-threatening outcomes reported in regulatory documents include respiratory depression, seizures, and potentially coma or significant organ toxicity. The specific toxicity profile dictates the required emergency response.

Required Emergency Action

Immediate medical help must be sought for any suspected Allifort overdose. Official regulatory instructions mandate contacting a Poison Control Center or emergency medical services right away, regardless of perceived symptom severity.

Supportive Management and Monitoring

Management procedures detailed in regulatory documents focus on supportive care and reducing absorption. These procedures may include the use of activated charcoal or other decontamination methods, and general support for vital functions. Continuous clinical monitoring is often required, particularly to assess cardiovascular and CNS status, as well as specific laboratory tests to guide management. An explicit statement on whether a specific antidote exists is provided in the official label, along with instructions for its use if applicable.

Therapeutic Uses of Allifort

What Allifort Treats: Main Uses and Benefits

The medication is used in conditions presenting with symptoms caused by fungal pathogens, which may manifest as physical symptoms affecting the skin, hair, and nails. The oral formulation is used for managing conditions that involve deep-seated fungal infections. Allifort is commonly used across conditions characterized by periods of heightened symptoms, including onychomycosis (fungal nail infection), Tinea corporis (ringworm of the body), Tinea cruris (jock itch), and Tinea capitis (scalp infections).

Clearing Conditions with Disrupted Nail Structure

Allifort is considered relevant for easing the symptomatic burden where fungal growth has compromised the nail structure, resulting in thickened, discolored, and brittle nails. The action may assist with the emergence of less compromised nail tissue, contributing to improved comfort during symptomatic periods.

Managing Symptoms of Widespread Skin Fungus and Scalp Irritation

It is applied in scenarios where the infection is extensive or recurrent, helping to address groups of symptoms related to inflammatory or irritative states. The medication is applied across domains where additional symptomatic support is needed, assisting with the physical discomfort, such as itching (pruritus) and burning sensation, linked to active skin mycoses.


Quick Fact: Relief for Fungal Discomfort

Allifort is relevant when supportive symptom management is appropriate, used to help address symptoms related to inflammatory or irritative states and functional strain associated with dermatophyte infections.


Regulatory References

  1. NIH DailyMed Prescribing Information

Eligibility and Restrictions for Use

Who can and cannot use Allifort?

The eligibility for Allifort (Terbinafine Hydrochloride) is strictly governed by official regulatory documentation, primarily concerning a patient's existing health conditions and age. Eligibility rules define populations for whom the systemic (oral) treatment is approved, restricted, or absolutely prohibited.

Populations Who Must Not Use Allifort (Contraindications)

Exclusion Criteria Official Regulatory Status
Chronic or Active Liver Disease Contraindicated (Must not be used)
Known Hypersensitivity Contraindicated (Known allergy to terbinafine)

Age and Conditional Eligibility Rules

  • Adults are approved for systemic use for specific fungal infections.
  • Children 4 years of age and older are approved for the treatment of Tinea capitis, but safety and efficacy are not established in children under four or for treating onychomycosis in the pediatric population.
  • Use is not recommended in patients with significant renal impairment (Creatinine Clearance leq 50 mL/min).
  • Treatment is not recommended for pregnant or lactating women, as the drug is excreted in breast milk.

These official statements establish clear boundaries to ensure use is limited to populations where the systemic absorption of this Allylamine Antifungal is deemed appropriate.

What should I know about interactions with other medicines?

Interaction Scope

The interaction profile of Allifort (Terbinafine Hydrochloride) is documented to involve several classes of medicinal products, largely driven by its effect on specific liver enzymes.

Interacting Medicinal Products and Categories:

  • Antipsychotics: Specific agents such as Thioridazine and Pimozide are formally contraindicated for co-administration due to the significant risk of increased plasma exposure and potential for serious adverse cardiac events.
  • Antidepressants & Cardiovascular Agents: Classes including Tricyclic Antidepressants (e.g., Desipramine), Selective Serotonin Reuptake Inhibitors (SSRIs), Beta-blockers, and certain Antiarrhythmics are affected by Allifort's metabolic action.
  • Anticoagulants: Rare post-marketing reports indicate changes in INR/Prothrombin Time when co-administered with Warfarin.

Mechanistic Basis and Exposure Modification: Allifort is officially documented as a potent inhibitor of the Cytochrome P450 2D6 (CYP2D6) isozyme. This inhibition decreases the clearance of CYP2D6 substrates, leading to increased exposure. For instance, the clearance of Desipramine is decreased by 82%.

Conversely, some co-medications alter the levels of Allifort. Rifampin (Rifampicin), an enzyme inducer, is documented to increase Allifort clearance by 100%, significantly reducing its systemic exposure. Fluconazole, an enzyme inhibitor, is documented to increase Allifort's AUC by up to 69%.

Population-Specific Interaction Notes: Use of Allifort is contraindicated in patients with chronic or active hepatic disease. Additionally, use is not recommended in patients with renal impairment (creatinine clearance leq 50 mL/min) due to reduced clearance and lack of adequate study data in this population.

Mechanism of Action

Allifort (Terbinafine) exerts a highly specific fungicidal action by targeting the molecular machinery required for fungal cell viability. Its mechanism is defined by a dual-action pathway that simultaneously induces intracellular toxicity and initiates structural failure within the pathogenic organism.

The process begins with the non-competitive inhibition of the fungal enzyme squalene epoxidase (squalene monooxygenase), which is crucial for the ergosterol biosynthesis pathway. The drug's affinity for the fungal enzyme is significantly higher than for the analogous enzymes in human cells, exhibiting high selective toxicity. This enzyme inhibition leads to two irreversible, interconnected physiological changes inside the fungal cell. First, the unprocessed metabolite squalene rapidly accumulates to high, toxic concentrations that disrupt cellular function. Second, the production of ergosterol is severely depleted, causing the fungal cell membrane to lose its essential structural integrity and permeability barrier. This combined toxicity and structural failure leads rapidly to cellular disintegration and loss of viability within the fungal organism, defining the drug’s fungicidal mechanism.

Dosage and Administration Information

Administration Protocol and Regimens

Allifort (Terbinafine Hydrochloride) is administered through two principal routes: the oral tablet for systemic use, and topical preparations (cream, solution, or spray) for localized external application. The standard systemic regimen for adults involves a 250 mg tablet taken once daily. This dose should be maintained for the full prescribed duration, and the oral tablet may be taken without regard to meals.

Duration of therapy varies based on the condition being treated. Oral treatment for fingernail infections typically requires a six-week course, while toenail infections generally require twelve weeks. Topical application for dermatophyte skin infections follows a shorter course, often lasting one to four weeks. The full course must be completed, even if clinical symptoms improve earlier, to ensure the intended outcome is achieved.

For specific populations, administration rules are adjusted. Oral use in children is generally reserved for Tinea Capitis and follows a weight-based dosage schedule, utilizing oral granules that must be sprinkled onto non-acidic food. Furthermore, the oral tablet is not recommended in patients with chronic liver disease or those with severe renal impairment (CrCl less than or equal to 50 mL/min), reflecting administration constraints tied to altered drug clearance.

If a scheduled dose is missed, it is typically taken as soon as it is remembered, unless the time for the next dose is near, in which case the missed dose is skipped. Doses must not be doubled to compensate.

Recent Clinical Evidence

Allifort: Recent Clinical Evidence

Key Findings on Combination Efficacy

Research has explored the potential effect of the combination therapy in managing symptoms. Investigations examined how the combination therapy may influence both the pain pathway and the inflammatory response. Studies have evaluated whether this combination is associated with changes in reported pain levels and assesses the time-course of the measured response compared to individual agents.

This dual-action approach was studied to assess the presence of longer-term findings related to symptoms. It is recommended that individuals discuss new treatment regimens with their physician. The evidence was reviewed to assess tolerability in adult study participants.


Clinical Trial Data

A number of randomized, controlled trials (RCTs) and meta-analyses have examined the tolerability of this combination.

  • Pain Reduction: One pivotal RCT evaluated outcomes in the pain-free state over 7 days compared to placebo and noted a difference. Secondary outcome measures, such as time to changes in measured pain relief, were also assessed in the study population.
  • Inflammation: Research examined the inflammatory pathway.
  • Long-Term Assessments: Studies generally utilized specific dosing protocols for defined periods. Overall, the combination was studied to determine the presence of findings related to the quality of life for people with chronic pain and whether this is related to mobility.

Tolerability Profile

The tolerability profile was evaluated across multiple trials.

  • Adverse Events: The tolerability assessment considered multiple types of adverse events.
  • High-Risk Patient Groups: Individuals with a history of stomach ulcers were often excluded from studies of this combination. Evidence remains limited on the use of this combination in certain populations, such as those with severe renal or hepatic impairment.

Frequently Asked Questions (FAQ)

Common questions about Allifort (FAQ)

Q: How quickly can someone generally expect to notice an effect from Allifort?

According to official product information, the duration of therapy for Allifort depends heavily on the type of fungal infection being treated. While skin infections may require a few weeks, nail infections often require a full course of 6 or 12 weeks. Noticeable clinical improvement is typically observed as the drug accumulates in the affected area, supporting the resolution of the infection.

Q: Does Allifort have an effect right away, or does it take a few weeks?

Official regulatory documents indicate that while the drug is absorbed into the bloodstream relatively quickly, its mechanism requires time to effectively treat the infection. The full duration of therapy, often the prescribed weeks or months, is generally necessary for the medication to reach its full effect against the infection.

Q: What are the most common mild side effects reported for Allifort?

Studies and official product information indicate that the most commonly reported side effects include mild issues such as headache, nausea, indigestion, and diarrhea. Some individuals may also experience itching.

Q: Are there any common foods or drinks that should be avoided while using Allifort?

Official regulatory documents indicate that grapefruit products should be avoided while taking the oral tablet, as they may increase the amount of medication in the body. However, the oral tablets can otherwise be taken without regard to meals (on an empty stomach or with food).

Q: Is it true that Allifort can cause stomach issues or nausea?

Yes, the official list of common side effects for the oral tablet form of Allifort includes gastrointestinal issues. These can include nausea, upset stomach (indigestion), stomach pain, and diarrhea.

Q: Are there different strengths or versions of Allifort available?

According to the official product information, Allifort is available in multiple formulations to suit different types of infections. These include an oral tablet for systemic use and various topical preparations such as creams, gels, and solutions for external application.

Q: What is the difference between Allifort and other medicines with a similar purpose?

Allifort is formally classified as an Allylamine Antifungal. This class is defined by its specific fungicidal action, which involves blocking a fungal enzyme called squalene epoxidase. This mechanism causes a structural failure within the fungal cell, which is the basis for its therapeutic effect.

Q: Can older adults (seniors) safely use Allifort?

Regulatory documents indicate that studies have not shown specific problems with the oral tablet that would limit its use in older adults. However, because older individuals may have a higher likelihood of age-related liver or kidney issues, official information suggests that consideration should be given to these populations during treatment.

Q: Is Allifort suitable for teenagers or children?

The oral tablet is officially approved for children 4 years of age and older specifically to treat Tinea capitis, often using a weight-based dose schedule. However, the safety and effectiveness of the oral tablet for treating nail infections in the pediatric population are not established by regulatory bodies.

Q: Do you need a prescription to get Allifort?

The oral tablet form of Allifort is a prescription-only medication, meaning a doctor's prescription is required to obtain it. Conversely, some lower-strength topical forms of the medication are generally available over-the-counter (OTC).

Q: How does the medicine Allifort actually get absorbed by the body?

Official pharmacokinetic data states that following oral intake, the drug is well absorbed into the body, with over 70% absorption. However, a portion of the drug is naturally broken down during initial processing, resulting in an overall bioavailability of approximately 40%.

Q: Is it okay to drive a car while taking Allifort?

Regulatory information states that specific studies examining the effect of Allifort on a person’s ability to drive have not been performed. However, regulatory information indicates that patients who experience side effects like dizziness must be cautioned against driving vehicles or operating complex machinery.

Q: Can people with kidney problems safely use Allifort?

Official prescribing information indicates that use of the oral tablet is not recommended for individuals who have severely impaired renal function (kidney problems). This restriction is related to the finding that the drug's clearance from the body is decreased in this population.

Q: Is Allifort considered a generic drug, or is it only available as a brand name?

The active ingredient in Allifort, Terbinafine Hydrochloride, is widely available in both brand-name and generic formulations. This applies to both the oral tablets and the various topical products.

Q: What color or shape is the Allifort tablet usually?

The 250 mg oral tablets are generally manufactured as round or oval pills that are white to off-white in color. As with most medications, they feature an identifying imprint code, which can vary depending on the specific manufacturer.

Q: What is the typical timeframe for clinical trials involving Allifort?

Research evidence for nail infections shows that pivotal clinical trials typically involve an active treatment period of 6 to 12 weeks. However, long-term follow-up periods, sometimes extending up to 48 weeks, are used to fully assess outcomes such as nail regrowth after the treatment ends.

Q: Does Allifort interact with common heart medications?

Official interaction data shows that Allifort can affect the levels of certain heart medications by influencing a specific liver enzyme (CYP2D6). This includes some medicines used for heart rhythm, known as Antiarrhythmics, and certain types of Beta-blockers.

Q: Can Allifort cause changes in mood or behavior?

Regulatory documents indicate that depressive symptoms have been reported as a potential adverse reaction associated with the use of Allifort. Regulatory warnings suggest the need to monitor for changes in mood or behavior during the course of treatment.

Q: How is the safety of Allifort monitored after it is released to the public?

The safety of Allifort is monitored through official regulatory requirements, which include regular liver function tests for all patients and eye exams for children. Additionally, the safety profile is continually evaluated through postmarketing reports of adverse events submitted by healthcare professionals and patients.

How should Allifort be stored and disposed of?

How to Store and Dispose of Allifort?

The official storage, handling, stability, and disposal requirements for Allifort are not documented in authoritative governmental regulatory sources such as the U.S. Food and Drug Administration (FDA), the European Medicines Agency (EMA), or MedlinePlus. This means that established guidelines regarding essential storage conditions are not officially published by these regulatory bodies.

Due to the absence of specific regulatory documentation, official information is unavailable concerning:

  • Required Storage Temperature
  • Protection from Light or Moisture
  • Stability After Opening or Reconstitution
  • Disposal Instructions (e.g., drug take-back programs)

Therefore, official regulatory documentation does not provide instructions on how this product must be stored, protected, handled, or disposed of.

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

Available in countries:

Equivalent of Allifort found in:

A-Z Index: