Tritak is a NEW fast acting triple action flea and tick treatment from Frontline. Frontline Tritak for dogs has 2 ingredients, fipronil and cyphenothrin, that kill fleas fast. But thats not all. It has a 3rd ingredient, (S)-methoprene, to bring down flea eggs and larvae too. So you can be sure you’re preventing and controlling an infestation. This fast acting formula starts killing fleas in 5 minutes and is effective on adult fleas, ticks, flea eggs and larvae. This waterproof treatment continues to protect your dog for 30 days, effectively breaking the flea life cycle, and it provides 30 days of protection from disease carrying ticks. This is the fastest acting flea and tick treatment on the market.