A 25-year-old member asked:
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what are the differences between pyrethrin and permethrin?

2 doctor answers
Dr. Christopher Crosby
16 years experience Dermatology
See Below: Both are insecticides. Pyrethrins are naturally occurring compounds derived from the chrysanthemum plant. Permethrin is a more potent synthetic version of the naturally occurring compounds.
Answered on May 29, 2019
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3 thanks
Dr. Michael Fisher
32 years experience Dermatology
Lice and Scabies: Pyrethrin is used to treat lice, which are tiny insects that can infest and irritate the scalp (head lice), the pubic area (crabs), or the body. This medication works by paralyzing and killing lice. Permethrin is used to treat scabies ('mites that attach themselves to the skin) in adults and children 2 months of age and older.
Answered on May 29, 2019

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Related questions:

A 23-year-old male asked:
Dr. J. Lawrence Dohan
57 years experience Dermatology
How long since treat: Itching with scabies is largely due to allergy against the mites. After killing the mites with Permethrin you are still allergic to the dead mites emb ... Read More
2
2 thanks
A 38-year-old member asked:
Dr. Morris Westfried
46 years experience Dermatology
1 oz: Apply to entire body from neck down and leave on overnight. Repeat in one week if necessary. Strip sheets and pillow case in morning and wash linens ... Read More
A 32-year-old member asked:
Dr. Jay Park
Dr. Jay Park answered
50 years experience Pediatrics
Not always: Some sarcoptes scabiei (mite causing scabies) became resistant to nix (permethrin) and requires lindane treatment.
1
1 thank
A 35-year-old male asked:
Dr. Julan Crane
25 years experience Pediatrics
Permethrin : Depends on what and how so check the label for indicated use and age.

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