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These permethrin FAQs explain the difference between skin and scalp products, persistent itching and when to ask for help. This is general education, not a personal treatment plan.
Updated: 29 October 2026. Source: MedlinePlus topical permethrin information. Product availability and instructions can differ between countries.
What is permethrin used for?
Permethrin kills mites and lice. Cream preparations are used for scabies, while certain lotions are used for head lice. Check the exact product and the condition it treats.
Are scabies cream and head-lice lotion interchangeable?
Do not assume they are. Application sites and instructions differ. Follow the supplied label and ask a pharmacist to confirm the formulation before use.
Does itching after scabies treatment mean it failed?
Itching can continue after treatment and does not by itself prove failure. Seek professional advice if you suspect persistent infestation rather than repeatedly applying more treatment.
What precautions should I discuss?
Mention allergies, sensitive skin or other skin conditions, all medicines, pregnancy and breastfeeding. Ask for age-specific advice when treatment is for a child.
Where should permethrin not be applied?
It is for external use on the skin or scalp as directed. Avoid the eyes, mouth and other sensitive areas; do not apply it to eyelashes or eyebrows.
When should I seek medical help?
Get urgent help for breathing difficulty. Contact a clinician for ongoing irritation or infected or pus-filled skin. Ask about cleaning recently used clothes, bedding and personal items.
Read the complete precautions and patient instructions at MedlinePlus. A pharmacist can explain the leaflet for your particular product.
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