Flea and tick control. Do not use on cats. Directions for use: it is a violation of federal law to use this product in a manner inconsistent with its labeling. Bio spot spot on flea & tick control for puppies prevents eggs from developing into adult fleas. Six month supply. Active Ingredients: Permethrin (Cas #52645-53-1). 45% (S)-Methoprene (Cas #65733-16-6). 3% Other Ingredients. 52% Total . 100% SMALL/6 PACK PINK