Best over-the-counter options for head lice
Over-the-counter only — nothing here needs a prescription. Want the prescription options too? Every head lice option we rate, prescription included →
For most head lice cases you can buy what you need at the drugstore: two over-the-counter pediculicides, permethrin 1% (Nix) and pyrethrin plus piperonyl butoxide (Rid), are the standard first-line treatments. They kill crawling lice but not all the unhatched eggs, so a second treatment about 9 days later is almost always needed, and combing the nits out with a fine-toothed comb is part of the job — not optional. One honest caveat: the CDC notes efficacy "may be reduced because of development of resistance," so in some areas the OTC products no longer work and a prescription is required. What you do NOT need to do is fumigate your home — the CDC is explicit that head lice do not survive long off a human head, and "fumigant sprays and fogs are not necessary to control head lice and can be toxic if inhaled or absorbed through the skin." Treat the infested person, check everyone in the household on the same day, and treat close contacts who also have live lice. Do not use OTC lice medicine on children under 2 months without a doctor.
Your OTC options, honestly rated
Permethrin 1% lotion/creme rinse (Nix)
Effective first-line OTCA synthetic pyrethroid applied to washed, towel-dried hair, left on ~10 minutes and rinsed. It kills live lice and has residual activity, but does not reliably kill all eggs, so nit combing and a repeat treatment are still required.
CDC lists permethrin 1% as a recommended first-line over-the-counter treatment and states to treat again "about a week after the first treatment (7 – 9 days depending on the drug)" Permethrin is FDA-approved for use in children 2 months and older.
Caution: Do not use on infants under 2 months. Rinse over a sink (not in the shower/bath) to limit skin exposure, and keep out of the eyes. If live, moving lice are still seen 8–12 hours after treatment, do NOT retreat immediately — the product may just be working slowly, or local resistance may mean you need a different agent.
Check price on Amazon ↗Pyrethrin + piperonyl butoxide (Rid, A-200, Pronto)
Effective first-line OTCA natural pyrethrin extract (from chrysanthemum) combined with piperonyl butoxide to boost potency. Applied to dry hair, left ~10 minutes, then rinsed. Like permethrin it kills hatched lice but not all eggs.
CDC lists pyrethrin with piperonyl butoxide as a first-line OTC option and recommends a second treatment on day 9 to kill newly hatched lice before they can lay eggs.
Caution: Not recommended for children under 2 years. Avoid in people with a known allergy to chrysanthemums/ragweed. Keep away from eyes. As with permethrin, documented resistance in some regions means it can fail even when used correctly.
Check price on Amazon ↗Wet-combing / manual nit removal
Relieves symptomsSystematically combing wet, conditioner-coated hair with a fine-toothed nit comb to physically remove lice and eggs. Used as an essential adjunct to every chemical treatment, and as a stand-alone option when medicines are avoided (e.g., very young infants, pregnancy).
MedlinePlus advises: "use a fine-toothed comb or special 'nit comb' to remove dead lice and nits" and to "comb your hair to remove nits and lice every 2–3 days… for 2–3 weeks to be sure that all lice and nits are gone."
Caution: Combing alone is labor-intensive and must be repeated consistently for weeks to work; it is a complement to, not usually a replacement for, an effective pediculicide. It does not, by itself, address a heavy active infestation quickly.
Repeat treatment on ~day 9
Relieves symptomsA scheduled second application of the same OTC product roughly 9 days after the first, timed to kill lice that hatched from surviving eggs before they mature and lay new eggs.
CDC: because OTC pyrethroids do not kill all eggs, to treat again "about a week after the first treatment (7 – 9 days depending on the drug)" to kill newly hatched lice.
Caution: Skipping the second treatment is the most common reason an otherwise-correct OTC treatment 'fails.' Follow the specific product label — some newer products have different retreatment schedules.
Prescription options if OTC fails (benzyl alcohol, ivermectin lotion, spinosad, malathion)
Relieves symptomsPrescription pediculicides with different active ingredients than the OTC pyrethroids. Used when OTC products fail after correct use, or in communities with known pyrethroid resistance.
CDC and AAP note that where lice are resistant to OTC active ingredients, prescription products "have different active ingredients… and may need to be used." Options include benzyl alcohol 5%, ivermectin lotion, spinosad, and malathion.
Caution: These require a clinician's prescription and have their own age limits and precautions (e.g., malathion is flammable and has an age floor; benzyl alcohol is not for infants under 6 months). Do not self-substitute or combine products.
Environmental / household cleaning
Relieves symptomsWashing recently-used bedding, clothing and hats, and soaking combs/brushes — a limited, targeted step, not a whole-house decontamination.
CDC: machine wash and dry items the infested person used in the 2 days before treatment on hot water (130°F) and high heat; items that can't be washed can be sealed in a plastic bag for 2 weeks. Crucially, "fumigant sprays and fogs are not necessary to control head lice and can be toxic if inhaled or absorbed through the skin."
Caution: Do not spend time or money on extreme cleaning or pesticide foggers — head lice die within 1–2 days off the scalp. Over-cleaning provides little added benefit; the person, not the house, is the target.
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See a clinician if…
- Infant under 2 months old with suspected lice — do NOT use OTC permethrin or pyrethrin; see a pediatrician (pyrethrins are not for children under 2 years; permethrin 1% is only for ages 2 months and up).
- Treatment failure: live, moving lice still present after two correctly-applied OTC treatments (including the day-9 repeat) — this suggests resistance and warrants a prescription-strength product from a clinician.
- Signs of a secondary skin/scalp infection from scratching — spreading redness, warmth, pus, crusting, swollen neck lymph nodes, or fever need medical care.
- Lice or nits found on the eyelashes or eyebrows — do NOT put lice shampoo/medicine in or near the eyes; this needs a clinician (eyelash involvement is also often a sign of pubic, not head, lice).
- Pregnancy or breastfeeding — check with a clinician before using any lice medicine; wet-combing is often preferred first.
- You are not sure it is actually lice — dandruff, hair casts, and residue are commonly mistaken for nits; confirm live lice or viable eggs before treating (don't treat 'just in case').
- Repeated or persistent re-infestation despite correct treatment of the person and household contacts — a clinician can help identify the source and confirm the diagnosis.
Bottom line
Over-the-counter permethrin 1% (Nix) or pyrethrin+piperonyl butoxide (Rid) clear head lice for most people — but only if you use them right: comb the nits out with a fine-toothed comb and repeat the treatment about 9 days later to catch newly hatched lice. Treat everyone in the house who has live lice on the same day. Skip the house fumigation — the CDC says fumigant sprays are unnecessary and can be toxic; a quick hot wash of recently-used bedding and clothes is enough. See a clinician if OTC treatment fails twice despite correct use (a sign of local resistance, when prescription options like ivermectin lotion, spinosad, or malathion are needed), if the child is under 2 months, if lice reach the eyelashes, if the scalp looks infected, or if you're pregnant or unsure it's really lice.
Frequently asked
- What is the best over-the-counter medicine for head lice?
- For most head lice cases you can buy what you need at the drugstore: two over-the-counter pediculicides, permethrin 1% (Nix) and pyrethrin plus piperonyl butoxide (Rid), are the standard first-line treatments. They kill crawling lice but not all the unhatched eggs, so a second treatment about 9 days later is almost always needed, and combing the nits out with a fine-toothed comb is part of the job — not optional. One honest caveat: the CDC notes efficacy "may be reduced because of development of resistance," so in some areas the OTC products no longer work and a prescription is required. What you do NOT need to do is fumigate your home — the CDC is explicit that head lice do not survive long off a human head, and "fumigant sprays and fogs are not necessary to control head lice and can be toxic if inhaled or absorbed through the skin." Treat the infested person, check everyone in the household on the same day, and treat close contacts who also have live lice. Do not use OTC lice medicine on children under 2 months without a doctor.
- Does Permethrin 1% lotion/creme rinse help with head lice?
- A synthetic pyrethroid applied to washed, towel-dried hair, left on ~10 minutes and rinsed. It kills live lice and has residual activity, but does not reliably kill all eggs, so nit combing and a repeat treatment are still required. CDC lists permethrin 1% as a recommended first-line over-the-counter treatment and states to treat again "about a week after the first treatment (7 – 9 days depending on the drug)" Permethrin is FDA-approved for use in children 2 months and older.
- Does Pyrethrin + piperonyl butoxide help with head lice?
- A natural pyrethrin extract (from chrysanthemum) combined with piperonyl butoxide to boost potency. Applied to dry hair, left ~10 minutes, then rinsed. Like permethrin it kills hatched lice but not all eggs. CDC lists pyrethrin with piperonyl butoxide as a first-line OTC option and recommends a second treatment on day 9 to kill newly hatched lice before they can lay eggs.
- Does Wet-combing / manual nit removal help with head lice?
- Systematically combing wet, conditioner-coated hair with a fine-toothed nit comb to physically remove lice and eggs. Used as an essential adjunct to every chemical treatment, and as a stand-alone option when medicines are avoided (e.g., very young infants, pregnancy). MedlinePlus advises: "use a fine-toothed comb or special 'nit comb' to remove dead lice and nits" and to "comb your hair to remove nits and lice every 2–3 days… for 2–3 weeks to be sure that all lice and nits are gone."
- When should I see a doctor for head lice?
- See a clinician if: Infant under 2 months old with suspected lice — do NOT use OTC permethrin or pyrethrin; see a pediatrician (pyrethrins are not for children under 2 years; permethrin 1% is only for ages 2 months and up).; Treatment failure: live, moving lice still present after two correctly-applied OTC treatments (including the day-9 repeat) — this suggests resistance and warrants a prescription-strength product from a clinician.; Signs of a secondary skin/scalp infection from scratching — spreading redness, warmth, pus, crusting, swollen neck lymph nodes, or fever need medical care.; Lice or nits found on the eyelashes or eyebrows — do NOT put lice shampoo/medicine in or near the eyes; this needs a clinician (eyelash involvement is also often a sign of pubic, not head, lice).; Pregnancy or breastfeeding — check with a clinician before using any lice medicine; wet-combing is often preferred first.; You are not sure it is actually lice — dandruff, hair casts, and residue are commonly mistaken for nits; confirm live lice or viable eggs before treating (don't treat 'just in case').; Repeated or persistent re-infestation despite correct treatment of the person and household contacts — a clinician can help identify the source and confirm the diagnosis..
Need the prescription options too?
This page covers what you can buy over the counter. Our guide to every treatment for head lice adds the prescription options a clinician can offer, each with our FDA recall-safety rating.
OTC options for other conditions
Sources
- CDC — Treatment of Head Lice↗
- CDC — Clinical Care of Head Lice (health professionals)↗
- American Academy of Pediatrics (HealthyChildren.org) — Signs of Lice & Treatment↗
- MedlinePlus (NIH/NLM) — Head Lice↗
- FDA — OTC Monograph M031: Pediculicide (lice treatment) Drug Products for OTC Human Use↗
- CDC — About Head Lice (fumigant sprays not necessary)↗
General information, not medical advice, and not a substitute for your clinician or pharmacist. Follow the label on any OTC product, mind interactions with your other medicines, and seek care for any red-flag symptom.