Frontline Spot On Medium Dog Spot on solution containing 10% w/v fipronil. Presented in plastic pipettes, each containing 0.67 ml (67 mg fipronil). The treatment and prevention of infestations by fleas (Ctenocephalides spp.) and ticks (Rhipicephalus spp., Dermacentor spp.and Ixodes spp.) and as part of a treatment strategy for Flea Allergy Dermatitis, where this has been previously diagnosed by a veterinary surgeon. The product controls infestations of biting lice (Trichodectes canis) on dogs. FRONTLINE Spot On Dog can be used in puppies from 8 weeks of age and weighing over 2kg.