Maple Leaf Medications has provided information from third parties intended to increase awareness and does not contain all the information about Frontline Spot On between 45 to 88lb or 20 to 40kg (Fipronil). Talk to your doctor or a qualified medical practitioner for medical attention, advice, or if you have any concerns about Frontline Spot On between 45 to 88lb or 20 to 40kg (Fipronil).