Frontline Plus Flea and Tick Treatment for Medium Dogs (23-44 lbs), 8 Month Supply. This topical treatment provides fast-acting, long-lasting protection against fleas, ticks, flea eggs, flea larvae, and chewing lice. Each package contains 8 doses (7+1 bonus dose) for complete monthly protection.

The formula combines two active ingredients: Fipronil (9.8%) which kills adult fleas and ticks by attacking their nerve cells, and (S)-methoprene (8.8%) which prevents flea eggs from hatching and disrupts the flea life cycle. When applied to a single spot between the shoulder blades, the treatment spreads across the dog's entire body through the oil glands in the skin, creating a reservoir that continuously replenishes protection for 30 days per dose.

Frontline Plus is waterproof 24 hours after application and approved for use on dogs 8 weeks or older weighing 23-44 pounds. It also aids in the control of sarcoptic mange infestations. Apply the entire contents of one applicator directly to the skin once monthly for continuous flea and tick control. Do not reapply for 30 days.