Hartz UltraGuard topical liquid products for cats all contain the active ingredient etofenprox. Etofenprox is classified as a synthetic non-ester pyrethroid that is effective against fleas and ticks.

What Are Advantage Products for Fleas, Ticks, and Heartworms? The Advantage line of products (manufactured by Elanco) includes topical products (products that are applied to the skin) for prevention ...

Fleas are a persistent problem for many pet owners, causing discomfort, allergies, and diseases in cats and dogs. While conventional flea control methods rely on chemical-based products, many pet ...