It starts with a burning sensation, which gets extremely intense in the areas where mites are most present. If you notice any other effects, check with your healthcare professional. 20%. "Product Information. This medication is for use on the skin only. Mayo Clinic does not endorse companies or products. Level 1 is the most toxic and Level 4 is the least toxic. A study was conducted involving … Permethrin may cause certain side effects in patients, most of which are related to the skin, such as redness, burning, swelling, and stinging, because permethrin is a topical medication. Burning, Baal, Soreness, Taste such as being impaled by a needle, and; Localized swelling. Take as directed by your doctor or follow the direction … It acts by destroying both the lice and their eggs. Available for Android and iOS devices. So, if permethrin has a side-effect, it is a positive one. Adverse Reactions: Pruritus, burning, stinging, tingling, numbness, erythema, rash. Skin sensitivity may occur in humans and horses. 17 years experience Dermatology. What is Permethrin Side Effects? [Ref], Nervous system side effects have included numbness and tingling (1% to 2%). Do not use on cats. Cypermethrin is a pyrethroid insecticide that mainly affects an insect’s central nervous system, used against a number of insect pests such as aphids, weevils, caterpillars, yellow cereal fly, flea beetles, blossom beetles, pod midge and moth pests on wheat, barley, oats, rye, triticale, peas and beans, brassicas, oilseed rape, sugar beets, fodder beet and mangels, potatoes, apples and pears. Even if all the scabies mites and their eggs have died, itching, stinging, or burning may continue for up to two weeks after treatment with permethrin cream. Information is for End User's use only and may not be sold, redistributed or otherwise used for commercial purposes. Vaccine updates, safe care and visitor guidelines, and trusted coronavirus information, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic School of Continuous Professional Development, Mayo Clinic School of Graduate Medical Education, FREE book offer – Mayo Clinic Health Letter, New Year Special -  40% off – Mayo Clinic Diet Online, Burning, itching, numbness, rash, redness, stinging, swelling, or tingling of the scalp. ).Some health conditions may make you more susceptible to the side-effects of the drug. Acticin; Elimite; Nix Creme Rinse; Canadian Brand Name. An Insecticide: The use of … 2 % 2 % Rash. The prevalent choice in most stores will be a DEET-based repellent, which has proven effective at repelling bugs in study after study. Permethrin prescription and dosage sizes information for physicians and healthcare professionals. Cypermethrin may also irritate the eyes. Description: Permethrin is a pyrethroid or pyrethrin pediculocide and scabicide. Burning, itching, numbness, rash, redness, stinging, swelling, or tingling of the scalp. Permethrin has little systemic absorption, and is considered safe for topical use in adults and children over the age of two months. Dermal contact with permethrin may cause sensitivity to sound or touch, abnormal facial sensation, a sensation of tingling, prickling, numbness, burning, and itching. List of known side effects. Rare occurrences of seizure have been reported; however, an association with the use of permethrin topical has not been confirmed. Portions of this document last updated: Aug. 01, 2020. Apply the medicine from your head to the soles of your feet, including under your nails and in skin folds such as between the toes, as directed. List of known side effects. If people eat permethrin it could cause sore throat, abdominal pain, nausea and vomiting. 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