What is the strongest medication for lice?

Author: Mrs. Stephania Gerhold DVM  |  Last update: Thursday, August 14, 2025

Ivermectin (Stromectol) is available by prescription as a tablet taken by mouth. The oral drug effectively treats lice with two doses, eight days apart. This drug is typically used when other treatments haven't been effective. Children must weigh at least 33 pounds (15 kilograms) to take oral ivermectin.

What is the strongest prescription for lice?

Pediculicides, particularly ivermectin lotion, are the strongest measures to get rid of a lice infestation.

What is the strongest head lice treatment?

Malathion (Ovide).

This very strong lotion paralyzes and kills lice and some lice eggs. It's approved for use in kids aged 6 years and older. If you still see lice moving 7-9 days later, you'll need a second treatment.

What kills lice 100%?

Tea Tree Oil. Though many people are sensitive to tea tree oil, it has been shown to be effective at killing lice. One study showed a 100% mortality rate after 30 minutes of treatment. A tea tree oil-scented spray or shampoo may be useful in preventing reinfestation.

What do doctors prescribe for super lice?

Prescription medications
  • Spinosad (Natroba). Spinosad is approved for adults and children age 6 months and older. ...
  • Malathion. Malathion is approved for adults and children age 2 or older. ...
  • Ivermectin (Stromectol).

Best Treatments for Lice | Consumer Reports

How do you get rid of super lice fast?

How to Treat Super Lice. If you have active lice, you should start by using pyrethrin shampoo or other over-the-counter lice treatments. Make sure to carefully comb your hair with a nit comb every night, and wash and dry linens, clothing, hats, and scarves. Repeat the treatment after 7 days.

Is ivermectin better than permethrin for lice?

Monisha et al. (2018) showed in a cohort study on the efficiency of 0.1% permethrin shampoo in comparison with 0.5% Ivermectine lotion in head lice infestation after treatment with topical permethrin and 0.1% Ivermectine lotion 0.5%, the presence of active nits were significantly reduced in the Ivermectine group (33).

What smell kills lice instantly?

Coconut, tea tree oil, lavender, eucalyptus, rosemary, lemon grass, and peppermint are scents popularly believed to repel lice. Using any coconut scented shampoo and conditioner is an easy way to increase your defense. At 1% concentration, tea tree oil killed 100% of head lice after 30 minutes.

How do you treat stubborn head lice?

Medicated lotions and sprays

These kill head lice in all types of hair, and you can buy them from pharmacies, supermarkets or online. Head lice should die within a day. Some lotions and sprays come with a comb to remove dead lice and eggs. Some treatments need to be repeated after a week to kill any newly hatched lice.

What type of hair gets lice the most?

Head lice are common in children between the ages of 3 and 11 years old. These pests are more prevalent in Caucasian children. They are more frequently found in girls than boys. Head lice live in all types of hair, whether it's curly, straight, dyed or natural.

What is the #1 lice treatment?

Malathion Ovide Lotion is a prescription-strength lotion that comes highly recommended by experts for treating lice. It's suitable for treating live adult lice and their eggs, known as nits. Malathion is applied directly to the scalp and dry hair.

What does the military use for lice?

Currently, DoD relies on permethrin to treat uniforms to repel and control body lice on soldiers, detainees, and DCs. Permethrin-treated clothing has been shown to offer protection against body louse infestations, even after over 20 wash cycles (10).

How to remove dead lice eggs from hair?

Removing Nits

After each medicine treatment, use the comb-out method every 2 to 3 days for 2 to 3 weeks to remove nits and eggs. Wet your child's hair. Use a fine-tooth comb (lice or nit comb) and comb through your child's hair in small sections. After each comb-through, wipe the comb on a wet paper towel.

What happens if you don't comb out dead nits?

If you do not comb out all the remaining nits, they will hatch and restart the cycle in 7-10 days from that point. That's why we recommend 3 treatments over a 12-day period of time. This stops the life cycle of lice. These are nits at different stages and a louse.

What stops nits from hatching?

Lice eggs are so small you would never know if they hatched or not. The only way to prevent them from hatching would be to remove them with a good metal nit comb, or your fingernails.

What do nits hate the most?

Lice dislike the smell of many things, but the thing they hate most is peppermint. So, before you send your kid off to hang out with other kids, spray them with a peppermint spray. It's the same concept as using a mosquito or bug spray in the summer months, except the scent is less offensive.

What can I spray in my hair to keep lice away?

From the #1 Pediatrician & Pharmacist recommended brand comes Nix® Lice Prevention Daily Leave-In Spray! Use year round, during lice outbreaks or to protect the whole family when a member has lice.

What happens if lice go in your ears?

Evidence of lice can often be found above or behind the ear, but they will not enter your ear—even if your ears are hairy. Itching inside your ears during a lice infestation is a sign of an allergic reaction. 5 Lice also cannot get into your brain through your ear or by burrowing through your skull.

What are super lice?

Superlice are head lice that have genetically mutated to become resistant to the active ingredients in some traditional lice treatment products. Superlice do not look any different from regular lice. They can only be identified by their resistance to traditional lice treatments.

Can I get ivermectin cream over-the-counter?

Ivermectin 0.5% topical lotion is used to treat head lice infestations. Ivermectin 1% topical cream is used to treat lesions of rosacea. Rosacea is a skin disease that causes redness and pimples on your nose, cheeks, chin, and forehead. This medicine is available over-the-counter.

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