Derbac M Liquid is a skin-friendly treatment used to eliminate head lice, crab lice, and scabies. It contains malathion, an insecticide that works by disrupting the nervous system of the parasites, killing them and their eggs. The liquid is applied directly to dry hair or the affected skin, left on for a specified time, and then rinsed off, with thorough combing recommended to remove dead lice and eggs.

Derbac M is suitable for adults and children over 6 months old and is free from harsh solvents, making it gentle on the skin and scalp. A repeat application may be needed after seven days.