Fipnil for Cats is an easy to use spot on solution for the treatment of flea and tick infestations. Effective against fleas for up to five weeks and against ticks for four weeks, Fipnil spot on solution can also be used as part of a treatment strategy for Flea Allergic Dermatitis, where this has been diagnosed by a veterinary surgeon. Each 0. 5ml pipette contains 50mg Fipronil. Use 1 pipette per cat. Always read the instructions before application. Please note:- These are medication products. To comply with VMD regulations and to ensure you receive the correct product for your animal, we will need to collect some basic information about your pet. Thank you!