# FRONTLINE Spot On Solution for Dogs | Flea and Tick Treatment > Frontline® Spot-On for Dogs is an effective topical treatment that kills fleas, ticks, and biting lice. Trusted by pet owners, it works fast—fleas die within 24 hours and ticks within 48 hours. Suitable for dogs of all sizes (Small, Medium, Large, and combinations for extra-large dogs) and puppie... *Source: https://ashcroft4pets.co.uk/shop-pet-supplies/frontline-spot-on-for-dogs/* **FRONTLINE Spot On for Dogs – Kills Fleas, Ticks & Biting Lice** FRONTLINE Spot On for Dogs is a fast-acting, vet-approved treatment that protects against fleas, ticks, and biting lice. It contains *fipronil*, an active ingredient that begins working quickly to eliminate parasites. It contains fipronil, which starts working quickly: - Kills fleas within 24 hours - Kills ticks within 48 hours - Eliminates biting lice **For best protection** - Apply every 4 weeks to protect against fleas and ticks. - Consider your dog’s lifestyle: outdoor dogs or those in wildlife areas are at higher risk of fleas and ticks.