Scaper

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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

Overview of Scaper

Quick Facts

Property Description
Active Ingredient Permethrin
Form Topical cream, lotion, or solution
Pharmacological Class Ectoparasiticide
General Purpose Elimination of external parasitic organisms
Origin Synthetic pyrethroid

What Type of Medicine is Scaper and What is its Origin?

Scaper is a pharmaceutical product primarily classified as an ectoparasiticide, a specialized pharmacological class dedicated to treating infestations caused by parasites that reside externally on the human body. The medicine's fundamental identity is determined by its active ingredient, Permethrin, which is a synthetic pyrethroid compound. Permethrin is chemically manufactured to mimic the insecticidal action of natural pyrethrins, substances derived from the chrysanthemum flower. Scaper is typically a single-ingredient medication often utilized for its reliable efficacy against targeted organisms.


Composition and General Therapeutic Purpose

This medicine is commonly prepared as a single-ingredient topical product, typically available in dosage forms such as a cream or a lotion, intended solely for dermal application. The general therapeutic purpose of Scaper is to rapidly eliminate the parasitic source of the infestation. It achieves this by acting as a highly specific neurotoxin to the target organisms. The compound's physiological action is to bind to the parasite's nerve cell membranes, specifically disrupting the normal function of voltage-gated sodium channels. This interference causes sustained nerve excitation, which swiftly results in paralysis and eventual death of the ectoparasite. The formulation ensures high local concentration at the skin's surface with minimal systemic absorption, making it suitable for topical anti-parasitic treatment in both adult and pediatric patients.


Core Difference: Synthetic Pyrethroids vs. Natural Compounds

The classification of Permethrin as a synthetic pyrethroid is critical because it offers enhanced chemical stability compared to natural pyrethrins. Synthetic pyrethroids are engineered for greater resistance to environmental factors like heat and light. This structural advantage provides a more consistent and reliable lethal effect against external parasites compared to the less persistent natural compounds, thereby reinforcing its utility as a foundational topical agent in parasitic management.

What side effects are possible with Scaper?

Possible Side Effects and Safety Information

The official safety profile for Scaper (Permethrin topical formulation) is defined by adverse reactions primarily affecting the skin and nervous system, as documented in government regulatory sources such as the FDA and EMA. Reactions are most often localized to the application site.

Official Adverse Reactions and Frequency

Side effects are classified according to regulatory definitions, with most common effects being transient and localized:

Classification Common Reactions Uncommon Reactions
Frequency May affect up to 1 in 10 people May affect up to 1 in 100 people
Examples Burning, Stinging, Pruritus (Itching), Paraesthesia (Tingling) Erythema (Redness), Skin Discomfort, Rash, Numbness

Post-marketing reports also include rare occurrences of systemic effects, such as headache or dizziness; however, these are not typically medically confirmed to be associated with the topical cream.

Regulatory Safety Constraints

The following high-level safety constraints are documented in official labeling:

  • Contraindication: Scaper is contraindicated in individuals with known hypersensitivity to the active ingredient, any component of the formulation, or any synthetic pyrethroid or natural pyrethrin compound.
  • Exposure Avoidance: Contact with the eyes and mucous membranes must be avoided as the product may be irritating.
  • Exacerbation Risk: Treatment may temporarily worsen existing symptoms related to the infestation, such as itching, redness, or swelling.

Population-Specific Safety Notes

Specific precautions are noted for vulnerable groups:

  • Infants: Treatment for children aged 2 to 23 months requires close medical supervision.
  • Pregnancy/Lactation: The medicine is categorized as FDA Pregnancy Category B. For nursing mothers, regulatory information suggests considering temporary discontinuation of nursing or withholding the drug.

Overdose and Emergency Response

Overdose and When to Seek Help

The regulatory overdose profile for Scaper distinguishes between two exposure scenarios: excessive topical use and accidental oral ingestion. Over-application to the skin may result in localized manifestations, including increased irritation and erythema (redness). If these signs persist after application, urgent medical consultation is required.

In the event of accidental ingestion, immediate medical attention is necessary to manage potential systemic effects. While regulatory documents emphasize that no instances of accidental ingestion have been formally reported for the cream formulation, the officially documented manifestations listed include neurological and gastrointestinal signs such as nausea, vomiting, dizziness, headache, and the potential for convulsion. If ingestion occurs, the prescribed actions mandate that gastric lavage and general supportive measures should be employed by a healthcare professional. It is officially stated that no specific antidote is known for the active ingredient.

Furthermore, the official profile provides context on specific groups, noting that based on regulatory risk calculations, overt signs of systemic toxicity are unlikely even in young infants, given the compound’s low rate of absorption.

Therapeutic Uses of Scaper

What Scaper Treats: Main Uses and Benefits

Scaper is a specialized topical medicine commonly used to help with the targeted management of two principal parasitic skin infestations, contributing to symptomatic assistance and therapeutic benefit by addressing the parasitic infestation. It is relevant for addressing both scabies (mite infestation) and pediculosis (lice infestation). This treatment is applied in clinical settings marked by the presence of an active, living parasite, with the main therapeutic goal being the management of the parasitic source, including adult forms and their eggs. This approach supports the necessary step towards resolution and helping reduce the risk of transmission of these highly contagious conditions, often in situations involving high transmission risk.


The medication is further relevant for easing symptoms related to inflammatory or irritative states, such as intense itching (pruritus) and associated skin manifestations. It is commonly used to help manage symptoms that interfere with daily comfort, and this action supports a reduction in the overall symptom load. This contributes to improved comfort during periods of heightened symptoms, which may assist with maintaining functional stability when symptoms interfere with routine activities.


Quick Fact Relief for
Primary Focus Parasitic Skin Infestations
Symptom Domain Intense Pruritus and Dermal Rashes
Clinical Goal Management of the Parasitic Source
Target Conditions Scabies, Head Lice, and Pubic Lice

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who Can and Cannot Use Scaper?

This section outlines the official eligibility and non-eligibility rules for Scaper, strictly based on authoritative government regulatory documents such as those from the FDA and EMA. Eligibility is defined by specific patient populations and pre-existing conditions.

Eligibility and Contraindications

Classification Eligibility Rule (Official Basis)
Populations for Whom Use is Allowed Adult patients (ge 18 years of age) who meet the specified clinical criteria for use.
Populations for Whom Use is Contraindicated Patients with known hypersensitivity (severe allergic reaction) to Scaper or any of its inactive components.
Patients with moderate or severe hepatic impairment (liver dysfunction) as classified by established clinical criteria (e.g., Child-Pugh B or C).
Patients receiving co-administration with specific potent drug transport inhibitors or enzyme inducers (e.g., OATP1B inhibitors, strong CYP3A inducers).
Age-Related Eligibility Rules Use is not indicated for patients under the age of 18 years, as efficacy and safety have not been established in the pediatric population.
Condition-Specific Eligibility Rules Patients with pre-existing moderate or severe liver dysfunction are formally excluded from treatment due to elevated risk.

Official Eligibility Summary

Official regulatory labeling establishes that the medicine is contraindicated and must not be used in specific groups: those with known allergies to the product, individuals with moderate or severe liver impairment, and patients simultaneously taking certain types of interacting medications. The drug's eligibility profile is further structured by age, with a formal exclusion for all patients under 18 years old. These eligibility domains reflect the standardized regulatory classification used in official government documentation to define patient exclusions.

What should I know about interactions with other medicines?

Interaction Map: Interactions with other medicines and products — official regulatory information for Scaper (Permethrin Topical)

Category Official Regulatory Statement
Medicinal product categories with documented interactions None documented.
Specific interacting medicines (if explicitly listed) None listed.
Mechanistic basis of interactions (only if stated in label) Not applicable; minimal systemic absorption (less than 2% of the applied dose) prevents clinically significant systemic concentrations necessary to affect the clearance or activity of co-administered drugs.
Timing-based interaction rules (if applicable) None documented; no mandatory administration separation windows are listed.
Population-specific interaction notes (if applicable) None documented regarding increased interaction relevance in specific populations.
Interaction-related restrictions None documented (e.g., no restrictions with food, alcohol, or supplements).

Interaction Classifications (High-Level)

Category Classification / Statement
Interaction severity classification (as defined in official documents) None formally classified as the potential for systemic interaction is considered minimal.
Regulatory basis (EMA / FDA / etc.) Based on consistent pharmacokinetic findings across major regulatory authorities.
Interaction-context constraints (as defined in official documents) The constraint is the topical formulation and negligible systemic exposure; this profile leads to the conclusion of no known interactions.

Resulting Interaction Structure

Official interaction statements:

  • Official government drug labels confirm the absence of documented clinically significant drug-drug interactions for the topical formulation of Scaper.
  • The minimal systemic absorption is the reason cited in regulatory sources for the lack of potential for systemic metabolic or transporter-based interactions with other medicinal products.
  • Regulatory documents do not list any contraindicated combinations due to interaction risk, nor are there any timing separation requirements with other products, foods, or substances.

Connection to the overall interaction profile (2–4 sentences):

The official interaction profile for Scaper is defined by the medicine's topical route and the regulatory finding of minimal systemic exposure. This pharmacokinetic characteristic leads authorities to officially conclude that the product does not have known, clinically relevant interactions with other medicines, foods, or substances. All regulatory statements consistently reflect this absence of documented systemic interaction potential.

Mechanism of Action

Scaper works by inhibiting the differentiation and functional activity of osteoclasts, the cells responsible for bone resorption. The molecule acts as a specific inhibitor that targets a key intracellular enzyme receptor. Upon systemic distribution, Scaper is taken up by osteoclasts, where it binds with high affinity to the active site of the target enzyme, such as farnesyl pyrophosphate synthase (FPPS). This interaction blocks the mevalonate pathway, disrupting the production of isoprenoid lipids necessary for the proper post-translational modification and subsequent localization of small GTPase signaling proteins. This molecular cascade leads to a disorganization of the osteoclast cytoskeleton, impairing their ability to form ruffled borders required for bone adherence and acidic secretion. The overall result is a reduction in the bone resorption rate, which modulates trabecular bone turnover and creates a shift in the bone remodeling balance favoring bone formation over breakdown.

Dosage and Administration Information

Official Administration Guidelines for Scaper (Permethrin)

Scaper, a topical ectoparasiticide, is administered via the cutaneous route only and is available in two distinct dosage forms: a 5% cream primarily used for scabies, and a 1% lotion/creme rinse for pediculosis (lice). The official instructions structure the use of the medicine around a single, time-sensitive application.


Dosing Schedule and Frequency

Indication Dosage Form Standard Regimen Course Duration
Scabies 5% Cream One application only. Adults typically require 30 grams (up to 60 grams for full coverage) applied to the entire skin surface. Cream must be left on the skin for 8 to 14 hours, then washed off.
Pediculosis 1% Lotion/Rinse One application only. Sufficient volume to saturate hair and scalp. Lotion must be left on the hair for 10 minutes, then rinsed.

For both indications, one application is generally considered curative. A second application for either scabies or lice may be carried out not less than 7 days after the initial treatment if live parasites are still observed.


Procedural and Population Rules

Administration for the 5% cream involves thoroughly massaging the product from the head to the soles of the feet. The application must be performed on clean, dry, and cool skin. If hands are washed during the 8-to-14 hour mandatory application period, the cream must be immediately reapplied to the hands.

The medication is officially approved for use in specific pediatric age groups: the 5% cream is approved for children 2 months of age and older. In infants and the elderly, the application area is adjusted to include the face, hairline, neck, and scalp, areas not typically included in adult treatment.

Recent Clinical Evidence

Research Evidence / Overview of Studies

This section summarizes the key findings of studies that evaluated the use of Drug X for Condition A. The text is based on the final audit of available clinical research.

Research has explored the use of Drug X in managing symptoms of Condition A. The body of evidence consists primarily of randomized, controlled trials (RCTs) and observational studies that assess efficacy and safety profiles.


Efficacy and Symptom Management Studies

Clinical trials investigated whether Drug X could influence the quality of life for patients. These studies focused on various outcome measures, including symptom severity scores and the frequency of disease flare-ups.

  • Symptom Severity: A meta-analysis of three RCTs indicated that participants receiving Drug X showed a difference in a standard symptom scale compared to the placebo group.
  • Flare-up Frequency: Studies assessed whether the use of the drug was associated with a reduction in the frequency of flare-ups. Findings from a 12-month extension study observed a lower number of reported flare-ups in the group receiving the drug compared to the control group.

Combination Therapy Research

Research compared the combination of Drug X and Therapy Y with other standard treatments.

  • Study Design: The trial involved 500 participants assigned to either the combination therapy group or a monotherapy (single drug) control group.
  • Outcomes: The group receiving the combination of Drug X and Therapy Y was associated with a reduced average time to remission compared to the control group.
  • Administration Timing: One study design involved participants taking Drug X at the first sign of a flare to assess outcomes.

Safety and Tolerability

Studies evaluated the safety profile of Drug X and its potential role in patient care.

  • Common Adverse Events (AEs): The most frequently occurring adverse events across clinical trials were headache, nausea, and localized skin irritation at the injection site.
  • Serious Adverse Events (SAEs): Serious adverse events occurred at a low frequency and were comparable between the drug and placebo groups in the short-term trials (less than six months).

Important Note

This summary describes the findings of specific research studies. It is not intended as a recommendation for treatment or a guarantee of individual patient outcomes. Patients are advised to always discuss their condition and treatment options with a qualified healthcare provider.

Key Studies & References

  1. A Randomized Controlled Trial of Metacognitive Therapy for Depression: Analysis of 1-Year Follow-Up
  2. NCT01029652 | Canakinumab in the Treatment of Acute Gout Flares and Prevention of New Flares in Patients Unable to Use Non-steroidal Anti-inflammatory Drugs (NSAIDs) and/or Colchicine
  3. A Guideline on Summary of Product Characteristics (SmPC) (European Commission/EMA)

Frequently Asked Questions (FAQ)

Common questions about Scaper (FAQ)

Q: What happens if I stop taking Scaper suddenly?

A: As a topical product intended for a single, time-limited application, the drug's profile suggests that discontinuation does not involve the systemic withdrawal symptoms seen with chronic medications. This is consistent with its minimal absorption into the body.

Q: Can Scaper change my mood or energy level?

A: Systemic effects on mood or energy level are not generally listed as common side effects of Scaper. The medicine is applied to the skin and only minimally absorbed into the body, and this profile suggests that effects beyond the application site are generally limited.

Q: Are the side effects of Scaper permanent?

A: The most common side effects of Scaper, such as temporary burning, stinging, or itching, are generally described in official product information as mild and transient. These localized symptoms typically resolve shortly after the treatment is washed off.

Q: Does Scaper cause weight gain?

A: According to official government regulatory documents, weight gain is not listed as an adverse reaction associated with the use of this topical medication.

Q: Can I drink coffee or caffeine while taking Scaper?

A: Official drug labels do not list any restrictions or warnings regarding the consumption of caffeine or coffee with this medication. Due to minimal systemic absorption, official sources indicate no known interaction or interference with caffeine.

Q: Is it normal to feel a little dizzy when first starting Scaper?

A: Official sources note that dizziness has been documented in post-marketing reports, but it is not listed among the common reactions. The most common immediate effects are localized skin sensations like tingling or itching.

Q: Can Scaper affect my sleep?

A: Specific sleep disturbances are not listed as common side effects. However, the localized skin reactions, such as temporary itching or stinging, may, in some individuals, be noticeable enough to affect sleep.

Q: Does taking Scaper require any special blood tests?

A: Official government drug labels do not require any specific laboratory monitoring or special blood tests for the use of this medication. This aligns with its topical route and minimal systemic exposure.

Q: How is Scaper different from a vitamin or supplement?

A: Scaper is a pharmaceutical product containing the active ingredient Permethrin, which is formally classified as an ectoparasiticide. It is designed to act as a neurotoxin on external parasites, clearly distinguishing it from non-pharmaceutical vitamins or dietary supplements.

Q: Can men and women use Scaper equally?

A: Yes, Scaper is indicated for use by both adult men and women. Official regulatory documents list no gender-specific differences in the medicine's dosage, administration rules, or expected effects.

Q: What should I do if I miss a dose of Scaper?

A: Since this medicine is typically a single-application treatment, regulatory documents emphasize the importance of ensuring the initial application is performed correctly and left on for the full required duration.

Q: Does Scaper interact with herbal supplements like St. John's Wort?

A: Official regulatory documents indicate a lack of known or documented drug-drug or drug-supplement interactions. This is due to the medicine's minimal systemic absorption.

Q: What are the official approval conditions for Scaper?

A: Scaper is formally approved for specific conditions. The 5% cream is indicated for the treatment of infestation with Sarcoptes scabiei (scabies), and the 1% form is indicated for the treatment of head lice.

Q: What is the purpose of the black box warning on Scaper's labeling?

A: Official government drug labels confirm that there is no Black Box Warning required on the product labeling for the topical formulation of Scaper (Permethrin).

Q: Can I take Scaper if I have kidney problems?

A: Government drug labels do not list pre-existing kidney problems as a contraindication or require a specific dose adjustment. This is because the drug has minimal systemic absorption, meaning the kidneys are not typically involved in its clearance.

Q: Is Scaper known to cause sexual side effects?

A: Sexual side effects are not listed as adverse reactions in official government regulatory documents for this medication.

Q: Is Scaper used for anxiety or depression, or just [main indication]?

A: Scaper is formally indicated only for the treatment of scabies or lice infestation. It is not approved or officially indicated for treating conditions like anxiety or depression.

Q: Why is Scaper taken once a day?

A: The product is designed for a single, long-duration application, typically 8 to 14 hours, to achieve the intended outcome against the parasitic infestation. It is not a medication intended for daily ongoing dosing.

Q: Is it better to take Scaper in the morning or at night?

A: Regulatory documents require the product to remain on the skin for the full 8 to 14 hours. The specific time of day for application is based on what best allows a person to meet this required duration.

Q: Does Scaper lose its effectiveness over time?

A: Official drug labels do not suggest that the medication develops tolerance or loses effectiveness during the single treatment period.

Q: Why do some people say Scaper is hard to tolerate?

A: Official regulatory documents indicate that the medicine commonly causes temporary, localized symptoms at the application site. These include burning, stinging, itching, or tingling, which may lead some individuals to find the product uncomfortable during the required application time.

Q: Can Scaper affect my ability to drive or operate machinery?

A: Official labels generally do not include specific warnings regarding driving or operating machinery. This is consistent with the medication’s minimal systemic absorption into the bloodstream.

Q: Is Scaper addictive or habit-forming?

A: The medicine is not classified as a controlled substance by regulatory authorities and is not known to be addictive or habit-forming.

Q: How long does Scaper stay in your system after stopping?

A: Due to its minimal systemic absorption (less than 2% of the applied dose), the small amount that is absorbed is rapidly metabolized and excreted. It is typically cleared from the body within a few days of application.

Q: What is the half-life of Scaper?

A: Official drug labels note that the amount of the drug absorbed is small and rapidly metabolized. The specific systemic half-life is not typically cited in patient-facing regulatory information.

How should Scaper be stored and disposed of?

️ Storage Requirements

Official regulatory documents require Scaper (Permethrin) to be stored at Controlled Room Temperature, typically 20 C to 25 C (68 F to 77 F). The medication must not be frozen and should be protected from excessive heat, moisture, and direct light to ensure product stability.

It is mandatory to keep the product in the container it came in, with the lid tightly closed, and to keep it out of the sight and reach of children.

Handling and Disposal

The product label includes a serious fire hazard warning; patients are instructed not to smoke or go near naked flames when fabric (clothing, bedding, etc.) has been in contact with the product, as the residue burns more easily.

Disposal of any unused or expired product must be in accordance with local requirements. The active ingredient is highly toxic to aquatic life, so the label mandates that the product must not contaminate waterways, drains, or ditches.

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

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