3 MONTHLY DOSES OF FLEA TREATMENT FOR DOGS: Each pack of TevraPet FirstAct Plus contains three (3) topical applicators of waterproof flea medicine for dogs that instantly begins to kill and control fleas and flea eggs, larvae, ticks, and chewing lice - and provides continuous protection for up to 30 days after each application VET QUALITY FORMULA, EASY TO USE: FirstAct Plus uses Fipronil and (S)-methoprene - the same safe and effective active ingredients as Frontline Plus for Dogs. This powerful formula starts to kill fleas and ticks within 24 hours. Simply apply the applicator to the skin on the back of your dog’s neck and the formula will migrate through the skin providing whole-body protection THE SAME ACTIVE INGREDIENTS AS FRONTLINE - FOR FAR LESS: It's worth repeating: Just like Frontline Plus, FirstAct Plus's powerful active ingredients REPEL and KILL fleas and ticks on contact and stop reinfestations. At TevraPet we firmly believe you shouldn't have to pay the "Brand tax" to protect your dog, and we are committed to providing affordable, veterinarian quality solutions without sacrificing an ounce of safety, effectiveness, or reliability