Derbac M Liquid is currently out of stock, however we offer a great range of alternative products. Hedrin Once Liquid Gel 15 Min CLICK HERE Linicin Head Lice Prevent Spray CLICK HERE Full Marks Solution Spray CLICK HERE Derbac M Liquid is a water-based formula, which is pleasant to use, ideal where asthma or sensitive skin is a problem & is suitable for use on children. Used according to the instructions, a single application of Derbac-M Liquid will kill lice, crab lice, the scabies mite & their eggs. The bottle contains enough liquid to treat up to four heads.