Treatment for head lice effective with one dose and no combing
https://www.health.harvard.edu/blog/new-treatment-for-head-lice-effective-with-one-dose-and-no-combing-201211015484
WebNov 1, 2012 · Most lice treatments need to be used twice, seven to 10 days apart, along with combing wet hair with a fine-toothed comb to remove nits. Some lice are resistant to pyrethrins and permethrin. That's when it makes sense to turn to stronger prescription drugs, such as ivermectin and spinosad (Natroba).
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