Full Marks is a clinically developed head lice treatment range formulated to kill lice and their eggs without the use of pesticides. The range centres on a dimeticone-based solution that works by physically coating and suffocating lice rather than targeting their nervous system, which means it remains effective regardless of insecticide resistance, a growing concern with common pyrethroids. The 200ml solution is applied directly to dry hair, left for ten minutes, then combed through thoroughly before rinsing. Because the mode of action is mechanical rather than chemical, it is suitable for repeated use when required. Full Marks also includes a nit comb and combined solution-and-comb kits, making it straightforward to complete a full treatment at home. For best results, a second application is recommended around seven days after the first to catch any eggs that hatch in the interval. The range is widely used across family households and is available here at Ronaghan's Pharmacy alongside supporting lice-detection combs and preventive sprays for a complete approach to head lice management.