Source: Medicines & Healthcare Products Regulatory Agency (GB) Revision Year: 2019 Publisher: Thornton & Ross Ltd, Linthwaite, Huddersfield, HD7 5QH, United Kingdom
The solution contains dimeticone, which is used in many pharmaceutical and cosmetic preparations. A 4% concentration has been found to affect the physico-physiological activity of lice. It is less effective in its ovicidal activity and therefore two applications 7 days apart are required.
Hedrin contains no neurotoxic organophosphate insecticides and therefore does not work by acting on specific enzymes within the louse. The Hedrin solution acts on the lice by a physical process to cover the lice and disrupt the ability of the lice to manage its water balance so that treated insects fail to excrete surplus water. Hedrin activity is not diminished in insecticide resistant head lice.
Hedrin is applied topically to the affected area but there is little or no absorption of Hedrin through the skin.
There are no further relevant data.
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