Permethrin
About Permethrin
Permethrin is a highly effective topical medication used to treat infestations of scabies and various types of lice, including head lice and pubic lice. It works by targeting the nervous system of these pests, helping to quickly eliminate them and their eggs from your skin and hair. This treatment provides rapid relief from the intense itching and irritation caused by these infestations.
Unlike daily medications, Permethrin is typically applied as a single treatment or in two separate applications spaced a week apart. Because it is a topical treatment applied directly to the skin or hair, it does not need to be taken with food. To support the results of this treatment, it is essential to wash your clothing and bedding in hot water to prevent the infestation from returning.
While using this medicine, you may experience mild and temporary side effects such as skin burning, stinging, or redness. These reactions are usually brief and resolve on their own. If you experience severe skin irritation, a spreading rash, or signs of a serious allergic reaction, stop using the product and consult your doctor immediately.
Do not use this medicine if you have a known allergy to it or to chrysanthemum flowers. Before applying this treatment, talk to your doctor or pharmacist if you have highly sensitive skin, open wounds, severe asthma, or other skin conditions that might make your skin more vulnerable to irritation.
There are very few known interactions with other medications, but you should avoid applying other topical creams or lotions to the same area at the same time. If you are pregnant, breastfeeding, or treating an infant or elderly individual, talk to your doctor or pharmacist before using this product to ensure it is used safely.
Uses of Permethrin
• Treatment of scabies: Permethrin effectively eliminates the mites responsible for scabies, helping to clear the infestation.
• Treatment of head lice: Permethrin is used to kill head lice that infest the scalp and hair.
• Elimination of eggs: Permethrin helps destroy the eggs (nits) of lice and mites, reducing the risk of reinfestation.
• Relief from itching and irritation: Permethrin soothes itching, redness, and irritation caused by lice and scabies infestations.
Medicinal Benefits
Permethrin helps eliminate parasites such as scabies mites and lice by targeting them directly on the skin or scalp. Its localised action helps relieve symptoms and clear infestations effectively.
- Eliminates Parasites: Effectively kills scabies mites, lice, and their eggs, helping clear the infestation.
- Relieves Itching and Irritation: Helps reduce intense itching, skin irritation, and discomfort caused by parasite infestations.
- Promotes Skin Healing: By removing the underlying cause of the infestation, it allows affected skin to recover and heal.
- Provides Targeted Treatment: Acts directly at the site of infestation with minimal absorption into the bloodstream.
- May Clear Infestations with Few Applications: Most infestations can be successfully treated with one or two properly applied treatment courses.
Directions for Use
Always follow your doctor's exact instructions when applying this medicine. The application process depends on the specific condition you are treating:
For Scabies Treatment:
- Ensure your skin is clean, cool, and completely dry before application. Do not apply immediately after taking a hot bath.
- Apply the cream thoroughly from your neck down to the soles of your feet, paying close attention to skin folds, between fingers and toes, under fingernails, and the groin area.
- Leave the cream on your skin for 8 to 14 hours as directed by your doctor.
- After the recommended time, wash the medicine off completely by showering or bathing with warm water.
For Lice Treatment:
- Wash your hair with a regular shampoo (do not use a conditioner or a 2-in-1 shampoo) and towel-dry it until it is damp.
- Apply enough lotion or gel to thoroughly saturate your hair, scalp, and the back of your neck.
- Leave the medicine on your hair for exactly 10 minutes, then rinse it out completely with warm water over a sink.
- Use a fine-toothed nit comb to remove dead lice and eggs from damp hair.
Storage
Side Effects of Permethrin
Common Side Effects (Usually mild)
- Mild, temporary burning or stinging on the skin
- Redness or mild swelling where the medicine was applied
- Temporary numbness or tingling of the skin
- Mild itching, which may temporarily worsen after application
Serious Side Effects (Consult your doctor right away)
- Severe skin irritation, blistering, or burning that does not go away
- Signs of an allergic reaction, such as swelling of the face, lips, tongue, or throat
- Difficulty breathing or severe dizziness
Medicines Containing this Salt
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Drug Warnings
- Avoid Application on Damaged Skin: Do not apply Permethrin to open wounds, cuts, or severely infected skin unless directed by your doctor.
- Avoid Contact with Eyes and Mouth: Keep the medicine away from the eyes, nose, mouth, and other sensitive areas. If accidental contact occurs, rinse thoroughly with cool water.
- Avoid Hair Products During Treatment: Do not use conditioners, hair masks, or oil-based hair products immediately before or after treatment, as they may reduce effectiveness.
- Persistent Itching May Occur: Itching can continue for several weeks after successful scabies treatment and does not necessarily mean the treatment has failed.
- Monitor Treatment Response: Consult your doctor if live lice or mites are still present 7 to 10 days after treatment, as an additional application may be required.
Drug Interactions
Drug-Drug Interactions
Inform your doctor if you are using any of the following products, as they may interact with Permethrin:
- Topical corticosteroids: Applying steroid creams to the skin immediately before or after using Permethrin can reduce your skin's immune response, potentially making it harder to clear the infestation or worsening skin irritation.
- Other topical skin products: Avoid using other medicated creams, ointments, or cosmetic lotions on the treated areas at the same time, as they may interfere with how this medicine is absorbed.
Drug-Disease Interactions
Inform your doctor if you have any of the following conditions before using Permethrin, as extra precautions may be required:
- Asthma: If you have severe asthma, inhaling vapours from the topical liquid or lotion might trigger breathing difficulties or wheezing.
- Severe eczema or damaged skin: Applying this medicine to highly irritated, broken, or raw skin may cause intense stinging and increase the risk of the medicine being absorbed into your system.
Drug-Drug Interactions Checker List:
Safety Advice
Alcohol
safeNo interaction was found.
Pregnancy
consult your doctorPlease consult the doctor. There are no adequate and well-controlled studies on pregnant women. Your doctor will recommend only if the benefits outweigh the risks.
Breast Feeding
consult your doctorConsult your doctor; there is no substantial research yet on using Permethrin in breastfeeding/nursing mothers.
Driving
safePermethrin may not have any effect on driving ability.
Liver
consult your doctorNo interaction was found/established. If you have any concerns, please consult the doctor.
Kidney
consult your doctorNo interaction was found/established. If you have any concerns, please consult the doctor.
Children
cautionChildren below 12 years should use Permethrin only when a doctor recommends it.
Habit Forming
Diet & Lifestyle Advise
- Wash Clothing and Bedding Thoroughly: Wash clothes, towels, bed sheets, and blankets used within the previous 48 hours in hot water and dry them using a hot cycle.
- Seal Non-Washable Items: Place items that cannot be washed in a sealed plastic bag for at least two weeks to help eliminate remaining parasites.
- Clean Household Surfaces: Vacuum carpets, rugs, mattresses, and upholstered furniture thoroughly and dispose of vacuum contents immediately after cleaning.
- Treat Close Contacts: Household members and close physical contacts may need evaluation or treatment to help prevent reinfestation.
- Avoid Sharing Personal Items: Do not share combs, brushes, hats, towels, bedding, or clothing until treatment has been completed successfully.
Special Advise
- Avoid scratching the skin as it may worsen the infection.
- Avoid direct skin-to-skin contact. Seek medical help if your sexual partner also develops scabies.
Patients Concern
Disease/Condition Glossary
Pediculosis: It refers to an infestation caused by lice, which are tiny insects that inhabit the scalp, body, or pubic region. These lice feed on human blood and lay eggs, known as nits, on hair strands or clothing. The condition leads to itching, particularly on the scalp or other affected areas, and is commonly transmitted through close personal contact or by sharing items such as combs or hats.
Scabies: It is a skin condition resulting from infestation by a mite called Sarcoptes scabiei. These mites burrow into the skin, where they lay eggs and provoke an allergic response. This causes intense itching, which tends to worsen at night, along with a rash that may include small bumps or visible burrow lines. Scabies is typically spread through prolonged skin contact or by sharing items like bedding and clothing.
FAQs
Permethrin is used for the treatment of Pediculosis (head lice infestation) and scabies (skin infection).
Permethrin contains Permethrin, an antiparasitic drug. It kills the small insects (mites) and their eggs that cause scabies. It also destroys head lice, which stick to your scalp and cause irritation.
The frequency of use depends on the condition being treated and your doctor's recommendations. In many cases, a single application may be sufficient, while some patients may require a second treatment 7–10 days later. Follow your doctor's instructions regarding dose and duration.
Generally, Permethrin should not be applied to the face unless specifically directed by your doctor. For adults, scabies treatment is usually applied from the neck down. In infants and elderly individuals, a doctor may recommend application to the scalp, forehead, and temples while avoiding the eyes, nose, and mouth. Consult your doctor before applying Permethrin to the face.
You can wear light clothes after applying medicine to the infected area. Wash the clothes with hot water after every use.
If you overdose or use too much medicine, rinse the area thoroughly with water. Reapply the medicine after drying the affected area. However, if you notice any abnormal signs or symptoms after applying the medicine, seek medical help immediately.
Permethrin may not cause hair loss or any hair damage.
Permethrin may cause side effects such as redness, skin irritation, burning or tingling sensation, numbness and rash. If these side effects persist or worsen, please consult your doctor.
You should be careful while using Permethrin as it gets absorbed into fabrics like clothes, dressings, and bedding and can easily catch fire from naked flame, if not cleaned properly after use.
If you forget to use Permethrin, apply it as soon as you remember. However, if you have any concerns, please consult your doctor.
No, do not stop using Permethrin without consulting your doctor even if you feel better as your symptoms may improve before the infection is completely cured. Therefore, for better results, it is advised to use Permethrin for the prescribed duration.
Permethrin is safe if used as prescribed by your doctor. Do not skip any dose. Follow your doctor's instructions carefully and let your doctor know if any of the side effects persist or worsen.
For scabies, you should leave the cream on your skin for 8 to 14 hours, or exactly as directed by your doctor, before washing it off thoroughly in the shower. Talk to your doctor if you have questions about your specific timeline.
Yes, scabies and lice spread very easily through close physical contact. It is highly recommended that all family members and close contacts be checked and treated at the exact same time to prevent re-infestation. Talk to your doctor or pharmacist for guidance.
Itching can continue for 2 to 4 weeks even after the mites have been successfully killed. This is a normal allergic reaction to the dead mites left in your skin. If the itching persists beyond 4 weeks, talk to your doctor.
This medicine is generally considered safe, but you should only use it during pregnancy or breastfeeding if clearly needed and recommended by your physician. Always talk to your doctor or pharmacist before starting treatment.
If this medicine gets into your eyes, flush them immediately with large amounts of cool, clean water. If burning, redness, or pain persists after rinsing, contact your doctor right away.
No, you should wash your hair with a basic shampoo and avoid using conditioners, hair masks, or 2-in-1 shampoos before treatment. Conditioners can coat the hair shaft and prevent the medicine from reaching and killing the lice. Talk to your doctor or pharmacist for more tips.
A single treatment is often enough, but a second application is sometimes needed 7 to 10 days later if live lice or new nit eggs are found. Talk to your doctor or pharmacist to confirm if a second treatment is right for you.
