Protect your dog with trusted, vet-recommended flea and tick defense. Frontline Plus for Medium Dogs (23–44 lbs) provides fast-acting, long-lasting protection against fleas, ticks, lice, and flea eggs and larvae. Formulated with two powerful active ingredients—Fipronil (9.8%) and (S)-Methoprene (8.8%)—this topical treatment breaks the flea life cycle and prevents re-infestation. It's waterproof 24 hours after application and remains effective for a full month, even after bathing or swimming. Easy to apply and safe for dogs aged 8 weeks and older, this solution is ideal for all life stages. Each box contains a monthly supply that ensures continuous protection. Keep your pet happy and healthy with Frontline Plus—your reliable partner in flea and tick control. Kills fleas, ticks, lice, and flea eggs/larvae Waterproof after 24 hours Once-a-month topical application For medium dogs weighing 23–44 lbs