Derbac M Liquid is an over-the-counter treatment containing malathion, available without a prescription for the management of head lice and scabies. The liquid is applied to the affected area and left on for the period specified in the patient information leaflet; application time and method differ depending on whether it is being used for lice or scabies, so reading the full directions before use is essential. Derbac M is one of the established options pharmacists recommend when mechanical removal alone has not been sufficient, or where a confirmed scabies infestation requires treatment of the whole household. As with all non-prescription medicines, a balanced approach is important: Derbac M works most effectively when directions are followed precisely, and not every presentation of itching or scalp irritation requires a medicated treatment. Ronaghan's Pharmacy stocks Derbac M Liquid for collection or delivery across Ireland. Always read the label and patient information leaflet before use; if you are unsure which treatment is appropriate, speak with one of our pharmacists. For a broader range of options, see our Head Lice Treatment category.