Frontline is a widely known brand of flea and tick treatment products for pets. They offer various formulations such as spot-on treatments, sprays, shampoos, and collars designed to protect dogs and cats from fleas, ticks, and other parasites. Frontline products typically contain active ingredients like fipronil and (S)-methoprene, which work together to kill adult fleas and prevent the development of flea eggs and larvae. These treatments are applied topically or through collars, providing long-lasting protection against pests, making them popular choices among pet owners and veterinarians alike.