Permethrin cream 5% for scabies
Examples
Generic Name permethrin 5% (Nix, Kwellada) How It Works
Ppermethrin 1% is used to treat lice but is not strong enough to cure scabies. Permethrin 5% kills the scabies mite.
The medicine will come with instructions, and your doctor will also give you a treatment schedule. Follow these instructions for using scabies medications:
For scabies (5% cream)
- Read package directions carefully before using.
- Thoroughly wash and dry skin.
- Massage the cream into the skin from the head to the soles of the feet, paying special attention to creases in the skin, hands, feet, between fingers and toes, underarms, and groin. Scabies rarely infests the scalp of adults, although the hairline, neck, side of the head, and forehead may be infested in older people and in infants. Infants should be treated on the scalp, side of the head, and forehead.
- Leave the permethrin cream on the skin for 8 to 14 hours.
- Wash off by taking a shower or bath.
- Put on clean clothes.
- After treatment, itching may continue for up to 4 weeks.
For lice (1% lotion)
- Shampoo the hair and scalp using regular shampoo.
- Thoroughly rinse and towel dry the hair and scalp.
- Allow hair to air dry for a few minutes.
- Shake the permethrin lotion well before applying.
- Thoroughly wet the hair and scalp with the permethrin lotion. Be sure to cover the areas behind the ears and on the back of the neck also. Allow the lotion to remain in place for 10 minutes.
- Then, rinse the hair and scalp thoroughly and dry with a clean towel.
- When the hair is dry, you may want to comb the hair with a fine-toothed comb to remove any remaining nits (eggs) or nit shells.
Why It Is Used
Permethrin cream is one of the first medications doctors prescribe to cure a scabies infestation.1 It is the treatment of choice for children and for women who are pregnant or breast-feeding. Permethrin 5% cream is considered safe for infants as young as 2 months old.2
Permethrin should be used with caution on people who are allergic to pyrethrin products or chrysanthemums.
How Well It Works
Research has shown permethrin to be more effective than lindane, without the risk of rare yet severe side effects.3 A single application of permethrin cream cures most scabies infestations. Itching usually decreases significantly within 24 hours, though some itching is common for up to several weeks after treatment.
People who have crusted (Norwegian) scabies (rare) may need to apply the medication several times. It may be necessary to follow the initial permethrin treatment with other scabies medications (such as lindane or sulfur) to cure this form of scabies.
Side Effects
Permethrin is considered very safe. Possible side effects include:
- Temporary redness of the skin.
- Itching.
- Burning or stinging.
If these side effects persist, call your health professional.
See Drug Reference for a full list of side effects. (Drug Reference is not available in all systems.)
What To Think About
Itching commonly continues for up to several weeks after treatment with a scabies medication. This doesn't mean that the scabies mites are still alive; it means that the body is still reacting to the mites and their feces.
Unless your health professional recommends it, do not apply permethrin scabies medication more than once. Overuse of scabies medications can irritate the skin and may increase the risk of side effects.
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| Author: | Shannon Erstad, MBA/MPH | Last Updated: May 24, 2007 |
| Medical Review: | Adam Husney, MD - Family Medicine Kathleen Romito, MD - Family Medicine Donald Sproule, MD, CM, CCFP, FCFP - Family Medicine | |
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| Topic Contents | |
| Examples | |
| How It Works | |
| Why It Is Used | |
| How Well It Works | |
| Side Effects | |
| What To Think About | |
| References | |