Description Amflee Combo kills fleas on treated dogs and prevents eggs laid by exposed fleas from developing for up to 8 weeks. Kills ticks on treated dogs for up to 4 weeks. Treats infestations with biting lice. Contains Fipronil 67mg and S-Methoprene 60.3mg. Apply to the spot on to the back of your pet’s neck. Only use this product if your pet is aged 8 weeks or older, and weighs more than 2kg. Do not use if your pet has a hypersensitivity to Fipronil or S-Methoprene or the other ingredients. Individual spot on.