Coal tar is a liquid by-product of the distillation process that turns coal into coke. It has long been used in products used in the treatment of skin complaints such as dandruff and psoriasis. It is also known to kill head lice when used as a shampoo.
Not all coal tar shampoos are equal when it comes to head lice. To effectively kill head lice you need to use an extra strength coal tar shampoo. Most "normal" strength brands have a 0.5% coal tar content. You'll need something stronger so read the labels. The strongest types are often referred to as being "therapeutic".
To kill head lice simply use the coal tar shampoo as normal but the lather on for 15 to 30 minutes. Then rinse through thoroughly.Do this for three consecutive days. Then use twice a week after that with daily combing until the head lice have completely gone.
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