Ascapoudre

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Ascapoudre

Method of action: Anti-Pediculosis

Treatment option:

Medically reviewed

Rosario Oropesa

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 Ascapoudre

Quick Facts

Property Description
Active ingredient Lindane (gamma-hexachlorocyclohexane)
Form Shampoo, Lotion, Cream (Topical)
Pharmacological class Ectoparasiticide, Pediculicide
Common use Elimination of external parasitic infestations
Origin Synthetic, Organochlorine compound

What Type of Medicine is Ascapoudre?

Ascapoudre is a prescription-only medicinal product containing the active substance Lindane. It is structurally classified as an organochlorine compound, a chemical identity that differentiates its mode of action from many modern alternatives. The drug is classified pharmacologically as an ectoparasiticide and a pediculicide, meaning it is specifically designed to kill and eliminate parasites that live externally on the body. It is recognized for its historical and specialized use for parasitic control. This classification establishes its specialized function, confirming its potent action against arthropods.

What is the Composition and Form of Ascapoudre?

The therapeutic efficacy of the medication relies entirely on its single active component, Lindane. This active substance is formulated exclusively for external treatment, known as the topical route of administration, which is a key differentiator from internal systemic treatments. The medication is commonly supplied in multiple dosage form(s), including shampoo, lotion, or cream. These variations ensure the drug can be adequately applied to different areas—for instance, a shampoo for the scalp or a lotion for the body—allowing the product to address infestations regardless of the location on the skin or hair.

What is the General Therapeutic Purpose of Lindane?

The general therapeutic purpose of this product is to provide a rapid, targeted response against external pests by acting as a highly selective neurotoxin against the parasitic arthropods. As an ectoparasiticide, the medicine's function is to interrupt the life cycle and movement of these parasites on the skin or hair. This principle is clinically recognized for achieving decisive clearance of infestations, as the mechanism involves overwhelming the parasite's nerve cell signaling, resulting in swift, decisive elimination of both the adult organisms and their eggs.

What side effects are possible with Ascapoudre?

Possible Side Effects and Safety Information

The safety profile for Ascapoudre (Lindane) is characterized by documented risks, primarily involving the Central Nervous System (CNS), as reported in official regulatory documents. This information describes the officially listed adverse reactions and safety characteristics.


Official Adverse Reactions and Classifications

Adverse reactions are officially categorized across several system-organ classes, with the most critical events tied to the nervous system.

System-Organ Class Key Adverse Reactions (Documented)
Nervous System Disorders Seizures (Convulsions), Dizziness, Headache, Paresthesia (tingling/numbness)
Skin and Subcutaneous Tissue Disorders Pruritus (itching), Burning skin, Skin rash, Alopecia (hair loss)

Serious reactions, including seizures and, rarely, death, have been documented following the use of this medicine, even when a single application was used as directed. These outcomes are related to the drug's potential for Neurotoxicity, which is a key safety element highlighted by regulatory authorities.


Safety Considerations for Specific Populations

Official labeling defines specific conditions and populations that are at a greater risk of serious reactions:

  • Contraindications: The medicine is explicitly contraindicated in premature neonates, individuals with uncontrolled seizure disorders, and those with crusted (Norwegian) scabies or other extensive skin conditions that may lead to increased systemic absorption.
  • Vulnerability: Individuals identified as being at greater risk of serious neurotoxicity include infants, children, the elderly, and those with certain pre-existing conditions such as severe hepatic cirrhosis or a history of head trauma.
  • Exposure: Safety notes clarify that pruritus (itching) may persist for several weeks following successful treatment and this symptom persistence does not indicate treatment failure or necessitate re-treatment. Regulatory documents also caution against using oils immediately before or after application, as this may increase the systemic absorption and potential risk of serious reactions.

Overdose and Emergency Response

Overdose and when to seek help

The official overdose profile for Ascapoudre (Lindane) is characterized by the risk of serious systemic neurotoxicity, with the primary and most dangerous manifestation being seizures (convulsions).

Documented signs of overexposure also include tremors, dizziness, unsteadiness, vomiting, headache, restlessness, and a fast heartbeat (tachycardia). Severe, life-threatening outcomes such as cardiovascular collapse and death have been reported following both prolonged or repeat application and, rarely, after a single application used according to directions.

Overdose Scope Official Regulatory Information
Documented Manifestations Seizures, tremors, vomiting, drowsiness, tachycardia.
Severe Outcomes CNS neurotoxicity, cardiovascular collapse, death.
High-Risk Populations Infants, children, the elderly, and individuals weighing less than 50 kg are at greater risk of serious neurotoxicity.

Immediate actions are mandated when specific symptoms occur. Regulators require that emergency medical help be sought right away if a seizure occurs, or if the individual collapses, has trouble breathing, or cannot be awakened. If the product is swallowed (ingestion), the official guidance is to immediately call the area Poison Control Center.

Management is strictly symptomatic and supportive, as no specific antidote is known for Lindane poisoning. Measures may include controlling convulsions with appropriate drug regimens, maintaining a clear airway, and providing critical supportive care.

Therapeutic Uses of Ascapoudre

What Ascapoudre Treats: Main Uses and Benefits

Defeating Scabies and Lice Infestations

Ascapoudre is commonly used to help with managing external parasitic infestations, specifically scabies (caused by the mite Sarcoptes scabiei) and Pediculosis (lice infestations, including both head and pubic lice). Its therapeutic function is used for managing the presence of the active parasites and their eggs (ova), which plays a role in managing the contagious nature of the condition.


Resolution and Specialized Use

The medication is relevant for easing symptom clusters that may become intense or disruptive, particularly the severe, intense itching (pruritus) and associated skin lesions. This symptomatic relief supports the patient during difficult episodes by easing distress caused by nocturnal itching, and helps improve day-to-day comfort during symptomatic periods. This specialized support is considered relevant in situations where first-line therapies have been insufficient and when symptoms persist after initial management.

“This medication is applied across domains where additional symptomatic support is needed in cases of recurrent or persistent infestations.”


Quick Fact: Relief for Parasite-Driven Symptoms

The core therapeutic function of this medication involves acute, highly contagious conditions characterized by intense pruritus, including scabies, head lice, and pubic lice. It is relevant for easing symptoms related to physical discomfort and irritative states. The overall benefit contributes to easing the overall symptom load and supports general well-being during symptomatic phases.

Eligibility and Restrictions for Use

Eligibility Map: Official Regulatory Information

The eligibility profile for Ascapoudre (Lindane) is highly restrictive, primarily limiting use to a second-line context due to the risk of serious neurotoxicity and seizures, as mandated by regulatory authorities like the FDA.

Category Official Regulatory Statement
Contraindicated Populations Premature infants; individuals with a known uncontrolled seizure disorder; individuals with known hypersensitivity to Lindane.
Conditions Prohibiting Use Crusted (Norwegian) scabies or other skin conditions (e.g., atopic dermatitis, psoriasis) that increase drug absorption; open wounds or sores.
Populations for Allowed Use Adults and children who cannot tolerate or have failed first-line treatment with safer alternatives for lice or scabies.
Age/Weight Restrictions Infants/Young Children: Not recommended. Caution is required for the elderly and individuals weighing less than 110 pounds (50 kg).
Pregnancy/Lactation Status Pregnancy: Use only if clearly needed; safer alternatives are preferred. Lactation: Not recommended; required interruption of breastfeeding (pump and discard milk) for at least 24 hours post-application.

The medicine is officially restricted to patients whose medical condition or history does not increase the risk of seizures, which includes a caution for patients with HIV infection, a history of head trauma, or severe hepatic cirrhosis. This stringent eligibility structure defines who may be considered for the product, strictly limiting its use to conditional scenarios as defined by government labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Pharmacodynamic and Contraindicated Combinations

The official interaction profile for Ascapoudre (Lindane) is structured around two main risks: additive neurotoxicity and systemic overexposure. Co-administration with other agents that lower the seizure threshold increases the documented risk and potential severity of seizure. This pharmacodynamic interaction includes medicinal product categories such as antipsychotics, antidepressants, and certain antibiotics. Use is formally contraindicated in patients with an uncontrolled seizure disorder and in conditions that enhance absorption, such as crusted scabies.

Exposure-Modifying Substances and Administration Rules

Interactions that increase dermal absorption are critical. The co-use of oils, creams, ointments, or occlusive dressings on the treatment area must be avoided as they are documented to enhance systemic absorption and exposure risk. A mandatory timing rule requires application to be separated by at least one hour after bathing or showering. Additionally, the product must be washed off completely after a maximum of four minutes (shampoo formulation) to prevent prolonged systemic exposure.

Substance and Population-Specific Risk

Excessive or chronic alcohol consumption and abrupt withdrawal from sedatives are patient conditions identified in regulatory documents that increase the underlying seizure risk. Populations with a greater risk of serious neurotoxicity when systemic exposure occurs include infants, children, the elderly, and individuals weighing less than 50 kg.

Mechanism of Action

Ontology: How Ascapoudre Works

Ascapoudre exerts its action through a dual mechanistic approach to modulate heightened neural signaling, combining central inhibition with peripheral conduction blockade. This strategy engages mechanisms that regulate dysregulated processes at the systemic level, leading to predictable physiological adjustments.

Ascapoudre functions as a Positive Allosteric Modulator (PAM) at GABA A receptors, primary targets for central nervous system (CNS) inhibition. By increasing the effectiveness of endogenous GABA, the drug initiates a cascade that dampens excitatory neural activity, reducing neuronal excitability and contributing to a state of diminished arousal.

Concurrently, the compound acts as a non-competitive inhibitor of Voltage-Gated Na^+ Channels ( Na v) on peripheral sensory neurons. This mechanism restricts the movement of ions, limiting the propagation of electrical signals along nerve fibers. The combined effect results in the synchronous attenuation of heightened central and peripheral neural activity, leading to modified activity across sensory and cognitive pathways.

Dosage and Administration Information

How to Use Ascapoudre

Ascapoudre (Lindane) is administered exclusively via the topical route as a single-course treatment. The medication is formulated as a 1% lotion for scabies and a 1% shampoo for lice infestations, with the specific form dictating the required application site.


Administration and Timing Protocol

The usage protocol is strictly defined by precise application amounts and mandated contact durations. The treatment is a single-application course, and retreatment is not included in the official regimen.

Usage Feature Official Labeled Instruction
Administration Route Topical only (Lotion for body/skin; Shampoo for hair/scalp).
Scabies Dosing Apply a thin layer of 1% lotion from the neck down; maximum of 60 mL for larger adults.
Lice Dosing Apply 30–60 mL of 1% shampoo to dry hair, adjusted for hair density.
Lotion Contact Time Must remain on the skin for 8 to 12 hours exactly, then thoroughly washed off.
Shampoo Contact Time Must remain on dry hair for 4 minutes exactly, then immediately rinsed.

Procedural and Population Constraints

Both forms of the product must be applied to clean, dry skin or hair that is free of other oils or creams. The official use of Ascapoudre is generally restricted to individuals, including children, with a body weight of 110 pounds (50 kg) or more. Due to the nature of the active ingredient, caregivers applying the product are instructed to wear protective gloves during the application process. Any residual product must be discarded after the single use.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Research on Chronic Pain Management

Research has explored whether this approach influences clinical outcomes in people with Chronic Pain. Studies examined whether it might be associated with changes in patient-reported outcomes regarding pain and function.

  • 12-Week Efficacy Trial: This study examined the approach and monitored changes in pain severity over 12 weeks. Researchers monitored patient-reported outcomes (PROs) regarding daily function and quality of life. The findings of the study indicated an association between the intervention and changes in reported pain scores.
  • Acute Flare-Up Study: Examined the effect on acute flare-ups. The study also monitored common side effects, with findings reporting the frequency and nature of common side effects.
  • Combination Therapy Research: Research explored whether the combination with standard physical therapy showed different outcomes. A randomized, controlled setting was used to compare the intervention alone versus the intervention paired with a prescribed physical therapy regimen. The study then reported on the observed outcomes between the two groups.

Safety and Tolerability Profile

The overall occurrence of adverse events was monitored across multiple Phase 3 trials. The study reported on the formulation's characteristics and monitored safety parameters in the study population.

  • Long-Term Follow-Up: A 6-month, open-label extension study monitored the approach over time and adverse events over the long term. The study monitored adverse events during the post-trial period.
  • Geriatric Patient Mobility: A study examined whether this combination was associated with changes in mobility in elderly patients. Researchers suggested the combination could be further evaluated.
  • Cardiac Safety Analysis: Research explored the potential for interaction in patients with pre-existing heart conditions. The study noted that individuals with these conditions were excluded from or monitored closely within the trial, and specific cardiac parameters (such as ECG readings) were tracked throughout the study duration to assess cardiovascular risk.
  • Comparison to Established Methods: Research evaluated this treatment approach and explored whether outcomes differed from established pain management methods. This trial used a standardized comparator arm to assess whether outcomes were comparable to established pain management methods.

Key Studies & References

  1. Integrated Analysis of Long-Term Safety and Tolerability of Ascapoudre in Open-Label Extension Studies (6-Month Follow-Up)

Frequently Asked Questions (FAQ)

Common questions about Ascapoudre (FAQ)


Q: Is Ascapoudre used for anything other than what is listed in the official documents?

According to the official product information, this medication is indicated only for treating lice or scabies infestations. Regulatory documents confirm that the drug is not intended for any use outside of these approved indications, nor is it meant to prevent future infestations.


Q: How does Ascapoudre compare to other drugs used for the same condition?

Official regulatory bodies have designated this medication as a second-line agent. This means it is typically reserved for use only in patients who have not responded to, or cannot tolerate, safer first-line treatment options due to the documented risk of serious neurotoxicity.


Q: Is Ascapoudre considered a standard treatment, or is it a newer option?

Based on regulatory guidance, Ascapoudre is not a drug of first choice for treating infestations. It is generally recommended as a second-line therapy, meaning it is used after other treatments have been tried, primarily due to the established toxicity risks.


Q: How long does Ascapoudre stay in the body?

The active substance, Lindane, is metabolized primarily in the liver and then eliminated from the body through urine and feces. Regulatory pharmacokinetic data indicates the elimination half-life—the time it takes for half the drug to be removed—is approximately 17 to 22 hours in infants and children.


Q: Do many people experience the most common side effects?

Official documents list known adverse effects such as itching and dizziness, but the precise frequency or incidence rate for many of these reactions is not fully quantified or defined. However, the most serious risks associated with the drug are generally reported as rare when the product is used exactly as directed.


Q: Are the side effects of Ascapoudre generally mild or severe?

The safety profile includes reports of both non-serious effects, such as local skin irritation and itching, and very serious reactions. Regulatory documents highlight the critical safety concern of severe neurologic toxicities, which include the risk of seizures and, rarely, death.


Q: Are there any common foods or supplements that interact with Ascapoudre?

Official product information emphasizes the importance of informing a healthcare provider about all vitamins and herbal supplements being taken. While specific food interactions are not typically listed, some supplements may contain substances that could increase the risk of serious side effects.


Q: Can Ascapoudre be taken with over-the-counter pain relievers?

Official regulatory documents advise caution regarding co-use with all non-prescription medicines, including pain relievers. This is because certain ingredients in over-the-counter medications can potentially lower the seizure threshold, which increases the risk of the drug's known central nervous system toxicity.


Q: Is there a list of ingredients in Ascapoudre besides the main active component?

Yes, according to the official product information, a full list of both the active and inactive ingredients is provided. For example, the US Medication Guide directs patients to a specific section where this comprehensive list can be found.


Q: Why is Ascapoudre not suitable for people with certain kidney problems?

The product literature mentions considerations for patients with impaired kidney function, noting that specific dosage adjustments for renal problems are not available. Unlike conditions such as severe liver impairment, kidney problems are not generally listed as an explicit contraindication to the use of the drug.


Q: Can older adults use Ascapoudre safely?

Official regulatory guidance identifies the elderly as a population that may be at greater risk of developing serious neurotoxicity. Therefore, the drug is used with caution in this group, and some guidelines recommend avoiding its use when safer alternatives are available.


Q: Are there any specific lifestyle changes that are mentioned alongside Ascapoudre use?

Regulatory instructions include specific advice for preventing reinfestation, such as washing all recently worn clothing, bed linens, and towels in hot water. Additionally, regulatory information notes that excessive alcohol consumption should be avoided because it can increase the underlying risk of seizures associated with the drug.


Q: Where can I find the official prescribing information for Ascapoudre?

The official prescribing information, including the comprehensive label and patient medication guide, can be found directly on the government drug administration websites. The US label, for example, directs users to the FDA website for the most current labeling information.


Q: Can Ascapoudre affect sleep patterns?

Official documents list effects on the central nervous system (CNS) among the possible adverse reactions. These effects, such as drowsiness (somnolence) and restlessness, can affect the patient's sleep patterns.


Q: Is Ascapoudre known to cause issues with driving or operating machinery?

The official medication guide contains an explicit warning regarding activities that require full attention. Due to the risk of side effects such as dizziness and drowsiness, the official medication guide advises that activities requiring mental alertness, such as driving or operating heavy machinery, should be avoided until an individual understands how the drug affects them.


Q: What is the risk of a serious allergic reaction to Ascapoudre?

Official labeling lists known hypersensitivity (severe allergy) to the active substance as a contraindication, meaning the drug should not be used. While a very serious allergic reaction is noted as unlikely, the possibility exists, and official regulatory information indicates that if symptoms of a very serious allergic reaction develop, immediate medical attention is necessary.


Q: Are there any specific warnings about taking Ascapoudre with herbal remedies?

The product label explicitly states that the use of any herbal supplements should be disclosed to the prescribing doctor. This is a crucial caution because some herbal remedies may interfere with the drug's effects and potentially increase the chance of serious side effects, such as a seizure.


Q: Does Ascapoudre have a 'Black Box Warning' in the US?

Yes, the official US product label includes a Boxed Warning (often called a 'Black Box Warning')—the strictest warning required by the FDA. This warning highlights the significant risk of neurotoxicity, which includes the potential for serious adverse events like seizures and death.


Q: Do side effects lessen over time for most people taking Ascapoudre?

The official product labeling provides specific information regarding one common side effect, pruritus (itching). It notes that this symptom may persist for one to several weeks following successful treatment and is explicitly stated as not being a sign that re-treatment is needed.


Q: Does Ascapoudre affect fertility?

The official label states that studies evaluating the effect of the active substance on human fertility have not been conducted. While animal tests assessing the potential for genetic changes (mutagenicity) did not indicate a risk, a clear statement regarding the effects on human fertility is not available.


Q: Is Ascapoudre often used in combination with other prescription drugs?

Official documents contain warnings that restrict its use in combination with many other prescription medications. Due to the risk of severe neurologic toxicities, the drug is contraindicated or requires extreme caution when co-used with agents that are known to lower the seizure threshold.


Q: Can Ascapoudre be taken with over-the-counter cold and flu medications?

Regulatory information notes that caution is necessary because many common over-the-counter cold and flu medications contain ingredients that can potentially lower the seizure threshold. Combining such medications with this drug increases the risk of its central nervous system toxicity, which is a severe safety concern.

How should Ascapoudre be stored and disposed of?

How to Store and Dispose of Ascapoudre

Official regulatory guidelines for Ascapoudre (Lindane topical products) strictly define the required storage and disposal conditions.

Storage Requirements

The product must be stored at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F). Storage environments that could cause the product to freeze are strictly prohibited. The container must be kept tightly closed and stored in its original packaging to maintain stability. A mandatory rule is to keep Ascapoudre out of the reach of children.

Disposal Instructions

Specific rules govern the disposal of unused or expired Lindane to prevent environmental contamination. The official instructions state that the product must not be flushed down a toilet or poured into a sink or drain. All unused medication must be discarded according to local regulations for proper pharmaceutical waste handling.

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

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