frequently asked questions

The more you know about lice and how to treat or remove them from your hair and
home, the more success you’ll have in eliminating them! Below are common questions that will provide you with the lice facts you need.

If you still can’t find an answer to your question, just ask!

Super lice, like regular lice, are parasitic insects that can live in the scalp and feed on human blood. Due to a genetic mutation, super lice have developed resistance to the common active ingredients found in over-the-counter treatments that kill lice.

Super lice are indistinguishable in appearance from head lice. They are tiny, wingless insects that live on the human scalp. They are about as big as sesame seeds and can be seen without magnification. However, lice eggs are about the size of poppy seeds and are challenging to see because their color easily blends in with the infested child’s hair.

The symptoms of super lice are the same as regular lice. The most common sign of an infestation is itching. However, an infestation may continue even after itching stops. With a first case of head lice, itching may not develop for 4 to 6 weeks. In fact, an infestation may be present even if there is no itching. Some children experience no symptoms. Never initiate treatment unless there is a clear diagnosis of head lice.

Because super lice and lice don’t differ in appearance, the same lice detection process
should be followed.

Super lice spread in the same manner as regular lice, the most common of which is through head-to-head contact with another infested person or by sharing personal items. Lice cannot fly or jump, but they can crawl very quickly. In fact, lice are not likely to leave a healthy head unless there is a heavy infestation.

To prevent an infestation from spreading, DON’T allow head-to-head contact and DON’T
share or borrow hair items (e.g., combs, headbands, etc.), headgear (e.g., hats, headphones, etc.), or other personal items.

The most common symptom of an infestation is itching. However, an infestation may
continue even after itching stops. With a first case of head lice, itching may not develop for 4 to 6 weeks. In fact, an infestation may be present even if there is no itching. Some children experience no symptoms. Never initiate treatment unless there is a clear
diagnosis of head lice.

Head lice are tiny, wingless insects that live on the human scalp. They are about as big as sesame seeds and can be seen without magnification. However, lice eggs are about the size of poppy seeds and are difficult to see because their color easily blends in with the infested child’s hair.

Eggs are laid near the hair’s root and are attached with a glue-like substance that can’t be washed or blown away. Once lice have hatched from eggs, they leave empty eggshells behind called “nits.” Nits vary in color—from yellowish-brown to white and are sometimes mistaken for flakes of dandruff, sand, or flakes of hairspray.

Learn More About Lice

No. The types of lice that infest humans do not live on pets or other animals. Other types of lice live on animals, but these lice do not infest humans. If there is a concern that an animal may have lice, please refer to a vet for additional information. RID® is not
approved for use on animals.

The most common way of getting head lice is through head-to-head contact with
another infested person or by sharing personal items. Lice cannot fly or jump, but they can crawl very quickly. In fact, lice are not likely to leave a healthy head unless there is a
heavy infestation.

To prevent an infestation from spreading, DON’T allow head-to-head contact and DON’T
share or borrow hair items (e.g., combs, headbands, etc.), headgear (e.g., hats,
headphones, etc.), or other personal items.

The answer to both of these questions is No. Although some people may believe there is
a connection between head lice and hygiene, this is not true. The truth is, personal
hygiene or cleanliness in the home or school has nothing to do with getting head lice. Furthermore, head lice are not known to spread disease and, as such, should not be considered as a significant medical or public health hazard.

Head lice can be passed from one child to another, usually by head-to-head contact. The
best way to prevent your child from getting head lice is to avoid sharing combs, brushes, barrettes, hair ribbons, headbands, or other personal items such as hats, sweaters, coats, scarves, helmets, headphones, pillows, or stuffed animals.

While the FDA has recognized products for head lice treatment as safe and effective, it has not approved products to prevent head lice.

Lice elimination does not generally require professional medical attention or a trip to the doctor. RID® products enable you to provide safe and effective lice treatment at home. RID has created the RID® Lice Treatment Complete Kit and RID® MAX Complete Lice Removal Kit to guide you through each of the steps. It includes scientifically proven products to kill lice, remove their eggs, and treat your home.

It is important to remember that, according to the CDC, for over-the-counter treatments, a second treatment is often necessary to kill any newly hatched lice before they can produce new eggs.

There are two primary active ingredients in over-the-counter lice treatments — permethrin and pyrethrin-piperonyl butoxide. Permethrin (e.g., Nix) has been formulated to be effective after a single application, but conditioners and shampoos may impair its adherence to the hair shaft and reduce its residual effect. Therefore, a second treatment is recommended following an appropriate interval after the first if live lice are seen. Products with pyrethrin-piperonyl butoxide (e.g., RID) are designed for two applications, which is in line with expert recommendations for a two treatment approach.

Caution should be used when selecting non-drug lice treatments (e.g., herbals) as the FDA has not reviewed their efficacy. According to the CDC, there is no scientific evidence to determine if the suffocation of head lice with mayonnaise, olive oil, margarine, butter, or similar substances is an effective form of treatment.

Regular lice can be treated and killed with the active ingredients found in RID® Lice Killing Shampoo, but super lice have developed a resistance to the active ingredients in some lice treatments. For super lice, we’d recommend the RID® MAX Lice Removal Kit with RIDvantage® Lice Comb—which is 100% effective at removing super lice, lice, and
eggs without those ingredients (based on laboratory combing study by trained testers).

Lice shampoo is designed to kill live lice, but unhatched eggs may still produce live lice. The newly hatched lice are not mature enough to reproduce. They will be eliminated by repeating Step 1: Shampoo and Step 2: Comb-out 7-10 days after the first application of RID® Lice Killing Shampoo.

You should also check other household members for head lice. If anyone in the
household is infested, treat them by following the RID® complete elimination process.

Head lice elimination products, such as the RID® MAX Complete Lice Removal, can be found in your favorite store in the First Aid or Shampoo aisle.

The patented RID® Lice Comb and RIDvantage® Lice Comb are meant to be reused. To disinfect, soak combs in hot water above 130 degrees Fahrenheit for at least 10 minutes.

Wetting the hair can dilute the treatment. You must be careful about reading directions before using the product. If you do apply RID Lice Killing Shampoo on wet hair, rinse the
Shampoo from the hair. Continue with the combing procedure in Step 2. Apply another treatment on DRY hair 24 hours later. This will be the Day One application. Reapply treatment 7 to 10 days later to kill any newly hatched lice. Continue with the combing procedure after each application to remove dead lice, eggs, and nits.

RID® MAX Complete Lice Removal Kit contains: 4 FL OZ (118 mL) Conditioning Solution, RIDvantage® Lice Comb, 3 OZ (85.1 g), RID® Home Lice, Bedbug & Dust Mite Spray, and complete lice treatment instructions.

RID® MAX Lice Removal Kit contains: 4 FL OZ (118 mL) Conditioning Solution, RIDvantage Lice Comb, and complete lice treatment instructions.

RID® Lice Treatment Complete Kit contains: 4 FL OZ (118 mL) RID Lice Killing Shampoo®, 2 FL OZ (59 ml) Lice & Egg Comb-Out Spray, 3 OZ (85.1 g) RID Home Lice, Bedbug & Dust Mite Spray, and the patented RID® Lice Comb. All sizes of the Shampoo and the Complete Kit contain step-by-step illustrated instructions.

RID Lice Killing Shampoo is available in: 2 FL OZ (59 mL), 4 FL OZ (118 mL), 8 FL OZ (236 mL)

RID Home Lice, Bed Bug & Dust Mite Spray is available in: 5 OZ (141.8 g)

Yes. Do not allow adults, children, or pets to enter until vapors, mists, and aerosols have dispersed, and the treated area has been thoroughly ventilated. See RID Home Lice, Bedbug & Dust Mite Spray Product details.

After you follow the 7-10 day lice elimination process, you should be free of lice after the day of your final shampoo application (if using RID® Lice Treatment Complete Kit or RID® Lice Killing Shampoo) or second combing (if needed) with the RIDvantage® Lice Comb.

To ensure that you are lice-free, you must follow all steps according to package directions. The full process requires 7 to 10 days, but everyone in the household should be checked for lice every day for two weeks.

The kit contains two sprays:

  1. RID® Lice & Egg Comb-Out Spray: to be used on the head to aid in detangling hair to make lice and egg comb-out easier. It can be applied as often as desired during the comb-out process.
  2. RID® Home Lice, Bedbug & Dust Mite Spray: to be used to kill lice and eggs on mattresses, furniture, car interiors, and other non-washable items. This product is not for use on humans and should NOT be used on the head.

No, Lice & Egg Comb-Out Spray is not currently sold separately. If you need more, you may use a conditioner as an alternative combing aid.

Successful treatment requires using RID® Lice Killing Shampoo on Day One and then 7 to 10 days later. You should not complete the second shampooing sooner than Day Seven. However, it is important to check the hair continually and remove any nits or eggs that may have been missed in the initial combing process.

If you have recently completed the RID® lice elimination process and have lice again, please consult a doctor or pharmacist before using RID® again.

Most lice will die within, or shortly after, the ten-minute dosing. Lice are very sensitive to light and will move quickly when alive. If you observe lice crawling after treatment, they are probably affected and will die shortly. You should just comb them out of the hair.

When using RID Lice Killing Shampoo, make sure to reapply the shampoo and comb out any newly hatched lice seven to ten days after the first shampoo.

No. Although RID® helps ensure complete lice elimination when used properly, it is designed for use in humans and is not approved for pets or any other animals. If you think your pet may have lice, be sure to contact your vet immediately.

While it is unnecessary to use your shampoo or conditioner after treatment, doing so will not interfere with RID®’s efficacy.

No. RID® Lice Killing Shampoo should not be used on an infant (under two years of age) without consulting a doctor.