The most common of the canine parasites, fleas create problems for both pets and humans because they multiply so quickly. The fleas on your dog are in the adult stage. An adult female flea, living on a pet, can lay up to 2,000 eggs in her lifetime. But PROGRAM® (lufenuron) Flavor Tabs® prevent flea eggs and larvae from developing. This breaks the flea life cycle at its base, and effectively wipes out the flea population. How PROGRAM Works PROGRAM Flavor Tabs contain lufenuron, an insect growth regulator that prevents the development of immature stages of the flea. Clean Some liquid-drop flea control products can leave pesticide residues that can rub off onto carpets, furniture and bedding. PROGRAM Flavor Tabs leave no pesticide residue in your home or on your dog. PROGRAM Flavor Tabs don't require gloves, have no special handling instructions, and cannot wash off. Safe But PROGRAM® (lufenuron) Flavor Tabs® have been demonstrated to be safe, with more than 250 million doses administered worldwide and over eight years of use. Effective In a three-year study, conducted in real homes with real pet owners, lufenuron, the active ingredient in PROGRAM Flavor Tabs, was shown to be 100% effective in preventing flea populations.* How to Use Flea populations are more prevalent in the spring when cold temperatures turn warmer, making it a more hospitable climate for parasites. You are more apt to encounter fleas in warm, humid areas. However, because weather patterns are always variable and unpredictable, it is important to use PROGRAM Flavor Tabs all year-round. Research shows that 100% of pet owners who use PROGRAM Flavor Tabs year round are satisfied. Give PROGRAM oral flea control once a month. Always give PROGRAM with a meal to ensure proper absorption. Make sure all pets in your home are protected against fleas.