Hedrin 4% Lotion Spray 120ml is a new way to eradicate head lice in adults & children aged 6 months & over. Instead of using an insecticide to poison the head lice, Hedrin uses Dimeticone to kill them with a non-chemical action. Hedrin can be used again & again because, unlike pesticide treatments, Hedrin’s mode of action means that lice do not develop resistance to it. & because Hedrin is not absorbed by the skin it is suitable for use by everyone in the family from the age of 6 months upwards.