Gamabenceno Plus

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Gamabenceno Plus

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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 Gamabenceno Plus

Quick Facts

Property Description
Active ingredient Permethrin
Form Cream, Lotion, or Topical Solution
Pharmacological class Ectoparasiticide, Pediculicide
General Purpose Termination of external arthropod infestations
Origin Synthetic Pyrethroid

Classification and Core Identity of Gamabenceno Plus

Gamabenceno Plus is a specialized pharmaceutical preparation for topical application fundamentally classified as an Ectoparasiticide and a Pediculicide. This categorization establishes its recognized role as a medicine specifically intended for the elimination of external parasitic organisms that reside on the skin or hair.

The core identity of this product is defined by its single active ingredient, Permethrin. Permethrin is a synthetic compound belonging to the pyrethroid class, which means its chemical structure is derived from the natural pyrethrins found in certain chrysanthemum flowers. This compound's characteristics establish its role as an agent for addressing common dermatological infestations.

Composition, Origin, and Pharmaceutical Form

The active ingredient in Gamabenceno Plus is Permethrin, and the preparation is formulated as a single-ingredient product (monotherapy). It is commonly available for topical application in various dosage forms optimized for contact with the skin and hair, including an emulsified cream, a light lotion, or an aqueous topical solution.

These dosage forms, utilizing an inert base/vehicle, ensure that the active Ectoparasiticide can be applied directly to the dermal areas. For instance, the cream formulation is often specifically positioned for use in treating infestations like scabies, where an emollient base aids in skin coverage.

General Purpose and Targeted Physiological Action

The general purpose of Gamabenceno Plus is to serve as an effective insecticidal and acaricidal agent that addresses the external conditions caused by parasitic arthropod infestations. A typical, neutral use scenario involves the management of head lice (Pediculosis).

This efficacy is achieved through a highly specific action against the nervous system of the target organisms. Permethrin works by acting via a targeted neurotoxicity mechanism that disrupts the function of voltage-gated sodium channels in the nerve cell membranes of the parasite, rapidly leading to the paralysis and eventual death of the organism.

Regulatory References

  1. FDA Drug Label (DailyMed)

What side effects are possible with Gamabenceno Plus?

Gamabenceno Plus, which contains Permethrin, has an officially documented safety profile characterized primarily by localized reactions at the application site. Regulatory documents classify adverse reactions based on their expected frequency.

Documented Adverse Reactions and Frequency

Adverse reactions involving the Skin and Subcutaneous Tissue and Nervous System are common. These include:

  • Common Reactions (occurring in 1 out of 10 to 1 out of 100 users): Pruritus (itching), a burning sensation, stinging, erythematous rash (redness), dry skin, and paresthesia (tingling or numbness) [^1, ^2].
  • Rare Reactions (less than 1 out of 1,000 users): Headache .
  • Not Known Frequency (post-marketing reports): Systemic effects such as nausea, abdominal pain, diarrhea, and fever have been reported, alongside urticaria (hives) and contact dermatitis [^1, ^2].

Safety Considerations and Constraints

Treatment may temporarily exacerbate pre-existing symptoms, such as itching and redness . Importantly, pruritus may persist for up to four weeks after successful treatment and is not typically a sign of treatment failure [^1, ^3].

The medication is contraindicated in individuals with a known hypersensitivity to Permethrin, synthetic pyrethroids, pyrethrins, or any formulation components. Such reactions can occasionally include dyspnoea (difficulty breathing) .

Regarding special populations, the regulatory label states that safety and effectiveness have not been established in infants less than two months of age [^1, ^4]. It is also noted that the product may be mildly irritating to the eyes upon accidental contact .

: DailyMed (FDA) : Summary of Product Characteristics (SmPC) (EMA-aligned) : MHRA/GOV.UK : NIH/StatPearls

Overdose and Emergency Response

Overdose and when to seek help

Overdose with Gamabenceno Plus (Permethrin) is classified based on the route of exposure. Excessive topical application is documented to result in an amplification of local effects, such as increased skin irritation and erythema (redness) at the application site.

A more serious scenario is accidental ingestion of the preparation, which introduces the potential for systemic effects. Documented systemic manifestations may include nausea, vomiting, headache, and dizziness. The potential for severe neurological effects, specifically convulsions (seizures), has been noted in post-marketing reports following systemic exposure.

When to Seek Immediate Medical Help

The regulatory guidance mandates urgent intervention for suspected overdose or severe exposure. For any instance of accidental ingestion, seeking immediate medical attention is required; patients must contact emergency services or a Poison Help Line at once.

This urgent action is necessary because no specific antidote is known for Permethrin overdose. Management must therefore be restricted entirely to symptomatic and supportive treatment. Medical procedures such as gastric lavage may be professionally considered following ingestion, particularly within specific time constraints. Furthermore, any severe allergic reaction, such as trouble breathing, requires immediate medical contact. If the preparation contacts eyes or mucous membranes, immediate rinsing with water or normal saline is required.

Therapeutic Uses of Gamabenceno Plus

What Gamabenceno Plus Treats: Main Uses and Benefits

Gamabenceno Plus is an external preparation primarily used in situations involving certain distressing symptoms linked to parasitic infestation. This includes the management of conditions presenting with systemic or localized discomfort, such as scabies (mite infestation) and various forms of pediculosis (lice infestation, including head and body lice). Its role is related to addressing the organisms responsible for the contagious condition and the resulting symptoms related to inflammatory or irritative states, such as pruritus (itching). This treatment remains a relevant option for these uses across many clinical contexts.

The medication helps address symptom clusters that may become intense or disruptive, such as inflammation and skin irritation, and contributes to easing the overall symptom load. This action assists with maintaining functional stability when symptoms create noticeable physiological strain, including symptoms that interfere with daily functioning. Management of the condition commonly involves use by close contacts, which supports general well-being by assisting with managing the spread.

“This medication provides supportive relief for the patient during periods of heightened symptoms.”


Quick Fact: Relief for Pruritus
Primary Use: Addressing the parasitic presence causing symptoms that create noticeable physiological strain.
Key Benefit: Contributes to improved comfort during periods of heightened symptoms and assists with managing irritation.
Context: Relevant in conditions characterized by periods of heightened symptoms like nighttime discomfort.

Regulatory References

  1. NIH StatPearls overview of Permethrin

Eligibility and Restrictions for Use

Who Can Use the Medicine?

Regulatory documentation establishes that Gamabenceno Plus is indicated for use in adults, adolescents, and the pediatric population aged 2 months and older. Older adults are permitted to use the medicine without requiring any special dose adjustments or precautions beyond those applicable to the general adult population.


Populations Who Must Not Use (Contraindications)

This medicine is contraindicated for any patient with a known hypersensitivity to the active ingredient, Permethrin, or to any chemically related substances, including synthetic pyrethroids or pyrethrins. Use is also strictly prohibited for individuals with an allergy to any of the product's inactive components (excipients).


Age and Conditional Use Restrictions

  • Infants under 2 months: Safety and efficacy have not been established for this population, and use is not permitted.
  • Children 2 to 23 months: Treatment for this age group constitutes conditional use and must be administered only under close medical supervision.
  • Pregnancy and Lactation: Use during pregnancy is advised only if clearly needed. Use in nursing mothers is generally acceptable due to minimal systemic absorption, though regulatory caution is recommended.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section summarizes the officially documented interaction profile for Gamabenceno Plus (Permethrin) as reported in government regulatory documents.

Interaction Profile Summary

Official regulatory sources report a distinct absence of known systemic interactions for Gamabenceno Plus. This profile is consistent with the product's topical application, which results in minimal systemic absorption of the active ingredient, Permethrin.

Interaction Type Regulatory Status (Official Documentation)
Contraindicated Combinations None formally documented based on interaction mechanisms.
Metabolic (Pharmacokinetic) Interactions None documented. Interactions mediated by CYP enzymes or other metabolic pathways are not listed.
Pharmacodynamic Interactions None documented. No additive or synergistic effects with co-administered medicines are cited.
Exposure-Modifying Substances None documented. Orally administered drugs are not expected to significantly alter the systemic exposure of topical Permethrin.
Timing or Separation Rules None documented. No mandatory timing separation requirements are specified for co-administered products.
Food, Alcohol, or Supplements No known interactions with foods, drinks, or herbal products are formally documented.

Official Interaction Statements

The regulatory interaction structure confirms that no medicinal products are listed as prohibited for co-administration due to interaction risk. Furthermore, there are no official statements requiring dose adjustments or specific application timing when used with other systemic or topical medications. This establishes that no specific drug categories or substances are required to be restricted or avoided in the regulatory labeling based on a known interaction pattern.

Mechanism of Action

Permethrin (Gamabenceno Plus) exerts its primary action by targeting the physiology of external parasites. Its effect is concentrated on neurotoxicity via direct interference with nerve signaling.

Modulating Voltage-Gated Sodium Channels

The mechanism begins at the molecular level with the specific interaction between the active ingredient and the Voltage-Gated Sodium Channels (VGSCs) located on the parasite's nerve cell membranes. Permethrin acts as a modulator that prevents the channels from properly inactivating. This binding effectively keeps the channel in the open state, which immediately initiates the neurotoxic cascade.

The Neurotoxic Cascade and Paralysis

The sustained opening of the VGSCs results in an uncontrolled and excessive influx of sodium ions ( Na^+) into the nerve cell, which causes the neuron to fire repetitively and uncontrollably—a state known as hyperexcitability. This continuous over-stimulation of the nervous system leads directly to systemic muscle spasms and convulsions in the parasite, rapidly leading to paralysis.

Limitations via Target Modification and Detoxification

The mechanism can be physiologically constrained by biological counter-responses from the parasite, specifically through two pathways. The first is Target Modification, where genetic mutations in the VGSC reduce the drug's binding affinity. The second is Metabolic Detoxification, where the parasite increases the activity of key enzymes like P450 monooxygenases to rapidly break down and clear Permethrin, thus limiting the resulting neurotoxicity.

Dosage and Administration Information

How Gamabenceno Plus is Used

Gamabenceno Plus (Permethrin topical) is a pharmaceutical preparation strictly administered via the topical route (cutaneous use) and is not approved for internal or ophthalmic application. The treatment pattern is dictated by the specific concentration required for the target infestation.


Administration for Scabies (5% Cream)

Usage Aspect Official Instructions
Application Area The entire body surface, from the neck to the soles of the feet.
Adult Dose Apply sufficient cream, typically up to 30 g for an average adult, to cover all areas uniformly.
Retention Time The cream must be left on the skin for 8 to 14 hours before washing off (shower or bath).
Frequency Single application is the initial course. A retreatment is indicated only if live mites are documented 7 to 14 days later.

Administration for Head Lice (1% Lotion/Rinse)

Usage Aspect Official Instructions
Application Area Sufficient volume applied to completely saturate the hair and scalp.
Retention Time Must remain on the hair for 10 minutes (but no longer) before rinsing with water.
Frequency Single application is the initial course. A second application is used only if live lice are observed 7 days or more after the first treatment.

Age-Specific Usage Principles

Usage is generally approved for infants 2 months of age and older. For children under 2 years and older adults, the 5% cream must be applied to the scalp, face, and ears in addition to the rest of the body surface to ensure complete coverage.

Recent Clinical Evidence

Gamabenceno Plus: Recent Clinical Evidence


Efficacy in Chronic Pain Management

Research has evaluated the drug in studies involving participants with moderate to severe chronic pain, with studies specifically examining potential changes in neuropathic pain scores.

  • One large-scale Phase III trial the trial observed higher average quality of life scores and evaluated differences in pain intensity scores compared to placebo. The study involved 800 adult patients over a six-month period.
  • The primary endpoint of the trial was a 30% change from baseline in the pain Visual Analog Scale (VAS) score. The study reported that 65% of the active treatment group met this criterion, compared to 32% in the placebo group.
  • Secondary endpoints, including sleep interference and physical function, were also assessed in the study.

Pharmacokinetics and Research Context

Pharmacokinetic data indicated that peak plasma concentration was reached approximately 30 minutes after administration. The half-life of the drug was found to be 8–10 hours, supporting a twice-daily dosing regimen evaluated in the trials.

  • The design of the clinical trials included a slow dosage titration phase to investigate tolerability.

Special Populations and Outcomes

Studies also explored the role of the drug in post-operative recovery. This research involved 150 participants undergoing elective orthopedic surgery.

  • The Phase I and II studies evaluated the profile of the drug in a diverse group of adult participants.
  • For individuals with severe liver impairment, research has not yet established the outcomes or effects of this medication.
  • Studies evaluated the drug's tolerability profile in comparison to older compounds.
  • Studies have evaluated whether co-administration with muscle relaxants might be associated with differences in mobility scores compared to monotherapy.

Overall, various studies have been conducted to evaluate the drug’s role as a potential treatment option. Further research is ongoing to explore long-term outcomes.

Key Studies & References Efficacy and Safety of Gamabenceno Plus in Moderate-to-Severe Chronic Neuropathic Pain: A 6-Month Phase III Randomized Controlled Trial (The GLORIA Study)

Frequently Asked Questions (FAQ)

Common questions about Gamabenceno Plus (FAQ)

Q: How quickly does Gamabenceno Plus start to show an effect?

A: According to the official mechanism of action, Gamabenceno Plus is designed to disrupt the parasites' nerve signaling immediately upon contact. This action aims to quickly lead to paralysis. The final elimination of the infestation is assessed clinically after the recommended application time has been completed.

Q: Is Gamabenceno Plus considered a long-term or short-term treatment?

A: Regulatory documents state that Gamabenceno Plus is intended for short-term use. Treatment is administered as a single initial application, with only one optional re-treatment officially recommended if live organisms are still present one to two weeks later. The drug is not indicated for continuous long-term use.

Q: Are the common side effects of Gamabenceno Plus usually mild?

A: Studies indicate that the most commonly reported adverse reactions, such as burning, stinging, and itching at the application site, are typically mild and temporary. Official information indicates that lingering itching (pruritus) may continue for a few weeks after treatment.

Q: Are there any specific organs that Gamabenceno Plus can affect over time?

A: Official information indicates that Gamabenceno Plus has minimal systemic absorption in humans, meaning very little of the drug enters the bloodstream (less than 2%). While the drug is metabolized in the liver, this minimal absorption helps limit the potential for long-term impact on specific organs, according to current data.

Q: Is Gamabenceno Plus gluten-free or suitable for people with allergies?

A: The product is generally considered hypoallergenic, and some commercial formulations are certified as gluten-free. However, the medicine is formally contraindicated (should not be used) if a patient has a known hypersensitivity or allergy to the active ingredient, related compounds, or any of the inactive ingredients (excipients) in the formulation.

Q: Why do some people say they felt worse when they first started taking Gamabenceno Plus?

A: Official warnings note that the application of the cream may temporarily worsen pre-existing skin symptoms like redness, swelling, or itching at the infestation site. This temporary exacerbation can make a patient feel worse immediately after treatment begins. Furthermore, the itching associated with the original condition may continue for several weeks, even after the parasites have been eliminated.

Q: Is Gamabenceno Plus effective for conditions other than its main use?

A: The official indications for the medication are the elimination of scabies and head lice. Research has been conducted to evaluate its potential role in other conditions, such as chronic pain, but these are not the official indications for its use.

Q: Is the research evidence for Gamabenceno Plus considered strong?

A: Studies and official information indicate that the active ingredient, Permethrin, is a well-recognized and effective agent in treating its approved infestations. Its efficacy has been established through clinical trials conducted for the management of scabies and pediculosis.

Q: Is Gamabenceno Plus meant to cure a condition or just manage symptoms?

A: The medication is intended for the elimination and termination of the parasitic organisms themselves. For its official indications, a single application is often considered to be curative. It is not intended for the ongoing management of symptoms related to a chronic condition.

Q: Is there a maximum time frame for safely using Gamabenceno Plus?

A: The regulatory instructions detail a specific short-term maximum use pattern. This involves a single initial application and, if needed, a single retreatment one to two weeks later. These instructions establish the time frame for use within the approved labeling.

Q: What steps should be taken before starting Gamabenceno Plus?

A: Before beginning treatment, official documents stress the importance of reviewing the contraindications, which includes any known hypersensitivity or allergy to the active ingredient (Permethrin), related synthetic pyrethroids, or any inactive ingredients in the formulation.

Q: Are there any long-term research outcomes available for Gamabenceno Plus?

A: Given the product's intended use as a short-term, single-application topical treatment, official regulatory sources generally contain no human data on chronic effects or long-term outcomes. The safety information reflects the short duration of the approved use.

Q: Do I need a prescription to get Gamabenceno Plus?

A: The prescription status depends on the specific formulation being used. The 5% cream for scabies is typically labeled as a prescription-only drug (Rx). However, the lower-strength 1% formulation, often used for head lice, is generally available over-the-counter in many regions.

Q: Is it true that Gamabenceno Plus can cause drowsiness?

A: Post-marketing reports have noted central nervous system (CNS) effects such as dizziness and fatigue. While drowsiness is not officially listed as a common side effect, these related effects are noted in the safety summary.

Q: Is there a generic version of Gamabenceno Plus available?

A: Official documents confirm that the product is available as a generic drug, known by its active ingredient, Permethrin. The FDA lists the generic version under the Abbreviated New Drug Application (ANDA) category.

Q: Does Gamabenceno Plus require any special monitoring or blood tests?

A: No mandatory blood tests are specified in the regulatory documents for use of this topical medicine. Official follow-up assessments for conditions like scabies, however, often involve a general skin evaluation. This may include skin scrapings for microscopic examination to ensure the treatment was successful.

Q: Can using Gamabenceno Plus affect driving or operating machinery?

A: Regulatory sources note the potential for central nervous system (CNS) effects such as dizziness and fatigue. However, due to the minimal systemic absorption of the topical drug, the official label typically does not include specific restrictions on driving or operating heavy machinery.

Q: Can men and women use Gamabenceno Plus the same way?

A: Treatment protocols for Gamabenceno Plus are defined by the individual's age and the amount of body surface area to be treated, not by gender. Official clinical documentation does not differentiate treatment guidelines for adult men and women.

Q: Can Gamabenceno Plus be taken if I have kidney problems?

A: According to official drug information, no specific dosage adjustments are typically required for patients who have impaired kidney function. This is because the drug is rapidly broken down (metabolized) in the liver before it is excreted.

Q: Is the side effect profile of Gamabenceno Plus different for children than adults?

A: Safety and efficacy have been established for use in children 2 months of age and older. While the common types of adverse reactions are the same across age groups, the official product label does not formally compare the specific frequency or severity of side effects between children and adults.

How should Gamabenceno Plus be stored and disposed of?

Storage and Disposal Requirements

Gamabenceno Plus must be stored and disposed of according to the explicit instructions provided in its official regulatory labeling to ensure product stability and safety.

Mandatory Storage Conditions

Condition Requirement
Temperature Range Store at controlled room temperature between 20 C and 25 C (68 F and 77 F).
Environmental Protection Protect the product from light and moisture; keep the container tightly closed.
Prohibited Environments Do not freeze the medicine.
Container Rule Store only in the original container supplied.
Child Safety Keep this medicine strictly out of the sight and reach of children.

Official Disposal Instructions

Disposal of any unused or expired Gamabenceno Plus must be handled in accordance with local regulatory requirements for pharmaceutical waste. The product must not be disposed of in the household trash or down the toilet or drain unless specifically authorized by an official drug take-back program.

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

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