Our flea drops will kill fleas and ticks for up to 4 weeks! This pack includes two tubes of Cutaneous Solution for use on dogs and puppies over 2 weeks of age. For the saftey of you, your dog and other pets always read the instructions before application. Active ingredient: 65% Cutaneous Solution Permethrin. IMPORTANT: these drops are extremely poisonous to cats and could kill them. To prevent cats from being accidentally exposed to the product you must keep treated dogs away from cats for 72 hours after the treatment. It is important to ensure that cats do not groom the site of application on a dog which has been treated with this product. Seek veterinary advice immediately if this occurs. WARNING: Extremely dangerous to cats and aquatic life. Avoid the drops coming in to contact with yourself or others, particularly children. Users making multiple applications should wear protective gloves. Keep away from food and drink. Please read the product label for further advice.