Frontline Combo Spot On Dog
Frontline Comboline Dog kills fleas within 24 hours and lice within 48 hours of administration. It also prevents flea larvae and eggs from developing on the skin. This also helps to prevent contamination of the environment around the treated dog (e.g. other pets).
The active ingredients are a combination of Fipronil and S-Methoprene. This last ingredient is effective against flea eggs and larvae and is not included in the regular Frontline Spot On variants that only contain fipronil.