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February 10, 2012

Head Lice (cont.)

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My child has head lice. I don't. Should I treat myself to prevent being infested?

No. Although anyone living with an infested person can get head lice, you don't need to be treated. Check household contacts for lice and nits every two to three days. Treat if lice and nits are found.

Should my pets be treated for head lice?

No. Head lice do not live on pets.

My child is under 2 years of age and has been diagnosed with head lice. Can I treat with prescription or over-the-counter (OTC) drugs?

No. For children under 2 years old, remove nits, nymphs (immature adult lice), and adult lice by hand, and see your health-care professional.

What OTC medications are available to treat head lice?

Many head lice medicines are available at your local drug store. Each OTC product usually contains one of the following active ingredients:

  1. Pyrethrins (often combined with Piperonyl butoxide, in brand name products: A-200, Pronto, R&C, RID, Triple X): Pyrethrins are natural extracts from the chrysanthemum flower. Though safe and effective, pyrethrins only kill crawling lice, not unhatched nits. A second treatment is recommended in seven to 10 days to kill any newly hatched lice. Treatment failures are common.


  2. Permethrins (NIX): Permethrins are similar to natural pyrethrins. Permethrins are safe and effective and may continue to kill newly hatched eggs for several days after treatment. A second treatment may be needed in seven to 10 days to kill any newly hatched lice. Treatment failures are common.

What is the prescription drug used to treat head lice?

Lindane shampoo (formally known as Kwell) is a prescription drug and is one of the most common treatments for head lice. When used as directed, the drug is probably safe. Overuse, misuse, or accidentally swallowing Lindane can be toxic to the brain and nervous system, and because of this, only a single application is recommended.

Malathion (Ovide) is another prescription drug that has recently been recommended as a first-line agent for the treatment of head lice. It is a combination drug and is mixed with isopropyl alcohol (rubbing alcohol) and terpineol (a naturally occurring tea tree oil extract), both of which have been shown to have some ability to kill lice. When used as directed, it is considered safe and has been available over the counter for many years in other countries such as the United Kingdom.


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Head Lice Infestation (Pediculosis) - Treatments Question: What treatment was effective for your head lice?
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