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(More customer reviews)This product (Hedlin in the UK) is a 4% dimethicone (dimeticone) solution. There is considerable misinformation on such products because they work in a novel manner. Lice can hold their breath and hang tightly to hairs when immersed in water or shampoo (called their "immersion reaction"). As soon as the water is removed, the lice become active again. LiceMD and Hedlin coat the lice with silicone and kill them not by suffocation or dehydration but by causing continuing physiological stress. You can find a scientific article about this in BMC Pharmacology by searching for: "The mode of action of dimeticone 4% lotion against head lice, Pediculus capitis." [...]
So, NO, LiceMD contains no pesticides. Anyway, lice have become resistant to the usual permethrin/pyrethrum neurotoxic agents in over-the-counter lice shampoos (Nix, Rid, or A-200), and strong malathion shampoo is an Rx.
And YES, LiceMD does indeed kill head lice. It also makes it easier to comb out live or dead lice and nits. Nits can also be removed with vinegar and a nit comb. Some schools have a zero nit policy.
But NO, LiceMD does not kill lice eggs, only hatched lice, so it must be repeated according to instructions.
BTW, head lice can only live a couple of days without feeding, so the best way to rid your house might be to take a vacation. Lice eggs are laid only on hair shafts and can only develop in warmth close to the scalp; they will die in about a week otherwise. Human head lice can't live on pets or anywhere but your scalp.
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