Quick Answer — What is Ivrea Shampoo?
Ivrea Shampoo contains ivermectin 1% — a topical treatment for head lice (pediculosis capitis). Applied to dry hair for 10 minutes and rinsed, a single treatment eliminates both adult lice and their eggs in most cases. It works by paralysing lice through glutamate-gated chloride channels, making it effective even where permethrin resistance exists.
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What Is Ivrea Shampoo?
Ivrea Shampoo is a medicated topical shampoo containing ivermectin 1% (10 mg/g), formulated for the treatment of head lice (pediculosis capitis) in adults and children aged 6 months and older. Unlike conventional anti-lice products that require repeated applications over 7–14 days, a single 10-minute application of Ivrea is designed to eliminate both live lice and their developing eggs, significantly simplifying treatment.
Head lice remain a common public-health challenge globally. In many regions, lice have developed resistance to older insecticides such as permethrin, pyrethrin and malathion. Ivermectin’s distinct mechanism of action makes it effective against these resistant populations and has led to its growing adoption as a first-line lice treatment in schools, families and community outbreaks.
Uses of Ivrea Shampoo
- Pediculosis capitis (head lice infestation) — primary indication; effective against both adult lice and nits (eggs).
- Permethrin-resistant lice — particularly valuable where traditional treatments have failed.
- Recurrent lice infestations — when repeated rounds of older treatments have not cleared the problem.
- School-age children and family outbreaks — convenient single-application protocol reduces the behavioural burden of compliance.
- Off-label: scabies — topical ivermectin is used in some protocols, though 5% permethrin cream or oral ivermectin remain first-line.
How Ivrea Works
Ivermectin is a macrocyclic lactone originally derived from the soil organism Streptomyces avermitilis. Its discovery was awarded the 2015 Nobel Prize in Medicine for its impact on parasitic diseases. In lice, ivermectin selectively binds to glutamate-gated chloride channels in insect nerve and muscle cells — receptors that are abundant in invertebrates but not present in humans in a form that can be similarly affected.
Binding causes a sustained influx of chloride ions, leading to hyperpolarisation of the insect’s neurones and muscle fibres. Lice become paralysed and die. Crucially, ivermectin also disrupts insect feeding behaviour at sublethal concentrations — lice hatching from eggs during the application period die before they can begin feeding, which is why a single application can be curative where older insecticides cannot.
Dosering en toediening
The standard protocol is a single application of Ivrea Shampoo to dry hair. For typical shoulder-length hair, approximately 30–60 ml is used; longer or thicker hair requires more. The shampoo is worked thoroughly through the hair and scalp, left in place for 10 minutes, and then rinsed thoroughly with water.
If lice persist at the 7-day mark, a second application may be given. Household contacts who have confirmed lice should be treated simultaneously. Combs, brushes, hair accessories and bedding should be washed in hot water (60 °C or above) or isolated in sealed bags for 2 weeks.
How to Use Ivrea Shampoo
- Start with dry hair — do not wet the hair before application.
- Shake the bottle well. Apply enough shampoo to saturate the hair from root to tip.
- Massage thoroughly into the scalp and distribute through all hair, ensuring complete coverage.
- Leave in place for exactly 10 minutes (set a timer).
- Rinse thoroughly with warm water. Hair may then be washed with a regular shampoo if desired.
- After drying, use a fine-toothed lice comb to remove dead lice and loosened nits from damp hair.
- Check hair daily for the next 2 weeks. A second application after 7 days may be used if live lice are still seen.
Side Effects of Ivrea Shampoo
- Vaak voorkomend: mild scalp itching or burning during or shortly after application; mild scalp redness; eye irritation if accidental contact occurs.
- Minder vaak voorkomend: dry scalp; dandruff-like flaking after treatment.
- Zeldzaam: allergic contact dermatitis; severe hypersensitivity reaction (hives, swelling) — discontinue use and seek medical advice.
Because ivermectin penetrates only minimally through intact skin and scalp, systemic absorption is negligible. Systemic side effects seen with oral ivermectin (nausea, dizziness, liver enzyme elevation) are not expected from topical use.
Precautions and Warnings
- Children under 6 months: safety not established; do not use.
- Zwangerschap en borstvoeding: topical ivermectin has limited systemic absorption, but use only if benefits outweigh risks and under medical advice.
- Eye contact: if the shampoo enters the eyes, rinse immediately with plenty of water.
- Broken or inflamed scalp: avoid application on open wounds or severely inflamed skin; systemic absorption may be increased.
- Concurrent scalp conditions (seborrhoeic dermatitis, psoriasis): consult a physician before use.
- Not for internal use: topical shampoo — never swallow.
Geneesmiddelinteracties
No clinically significant drug interactions are expected with topical Ivrea Shampoo due to negligible systemic absorption. Avoid applying other medicated hair products (anti-dandruff shampoos, corticosteroid scalp lotions, coal tar preparations) during the 10-minute application to avoid dilution or interference with ivermectin activity.
Opslag
Store Ivrea Shampoo at room temperature below 30 °C, away from direct sunlight and heat. Keep the bottle tightly closed when not in use. Keep out of reach of children. Do not freeze.
Veelgestelde vragen
Does Ivrea kill lice eggs as well as adult lice?
Yes — this is one of its main advantages. Ivermectin has a sustained effect on developing lice and disrupts the feeding behaviour of newly hatched nymphs, killing them before they can establish. This is why a single 10-minute treatment usually clears an infestation, whereas older treatments require repeat applications 7–10 days apart to catch newly hatched lice.
How is Ivrea different from permethrin shampoo?
Both are insecticidal topicals, but they work through different mechanisms. Permethrin targets sodium channels in lice nerves; ivermectin targets glutamate-gated chloride channels. Lice populations that have become resistant to permethrin are still typically susceptible to ivermectin. Ivermectin also requires only a single application, versus the two-application protocol for permethrin.
Can my child go to school after Ivrea treatment?
Most schools allow return after effective lice treatment. Once Ivrea has been applied, rinsed off, and the hair combed through, live lice should be eliminated within hours. Household members should be checked, and combs/bedding laundered to prevent reinfection.
Does Ivrea leave a medication smell?
Ivrea has a mild, non-offensive scent and washes out easily with a regular shampoo. There is no persistent medication odour once the hair is dry.
Can I use Ivrea if I am pregnant?
Systemic absorption from topical application is minimal, but formal safety data in pregnancy is limited. Consult your healthcare provider before use during pregnancy or breastfeeding.
What if lice come back after treatment?
Reinfestation is common when only one person in a household is treated. Check all household members for lice. If live lice are detected 7 days after treatment, a second application of Ivrea can be given. If infestation persists despite two treatments, consult a physician — oral ivermectin or another class of treatment may be appropriate.
Is Ivrea safe for children?
Topical ivermectin shampoos are approved for children from 6 months of age. For younger infants, alternative treatments (wet combing, physical removal) are preferred. Adult supervision during application is essential to prevent eye contact or ingestion.
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