FRONTLINE® Plus Spot On for Dogs - L (20-40kg) features a double-action, advanced formula to tackle fleas and ticks, shielding your dog from the discomfort and parasite-caused diseases. The targeted treatment kills fleas within 24 hours and ticks within 48 hours. Additionally, it provides enhanced household protection by preventing flea eggs from hatching, which breaks the flea life cycle, ridding both your pet and home of infestations. FRONTLINE® Plus Spot On for Dogs - L (20-40kg) is a highly efficacious, easy to apply formula with an exemplary safety profile, yet without the need for a veterinary prescription. Simply remove 1 pipette from the pack, snap applicator tip, part your dog's fur at the base of their neck and apply to the skin. Check your dog for ticks regularly - they can pick them up anytime they explore outside. Treat all dogs in the household every 4 weeks for optimum flea and tick protection. Always select the correct pipette size for your your dog's weight. FRONTLINE®