About permethrin
Topical pyrethroid antiparasitic
Used for
- Treats head lice and their eggs.
Usual adult dose
Apply to damp hair and scalp, leave for 10 minutes, then rinse. Repeat after 7 days if needed.
Usual dose in children
For children aged 2 months and older: apply to damp hair and scalp, leave for 10 minutes, then rinse. Repeat after 7 days if needed.
Common side effects
- Scalp itching, redness, or irritation
- Burning or tingling
- Rash
Important warnings
- For external use only; avoid eyes, mouth, and nose.
- Do not use in infants younger than 2 months.
- Avoid contact with broken or inflamed skin.
- Use the product directions; formulations and approved ages can vary.
Pregnancy
Generally considered low risk because little is absorbed through skin; human pregnancy data are limited.
Breastfeeding
Generally considered compatible; avoid applying to the breast or allowing infant skin contact with treated areas.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.