Comparing Topical Flea Medicines for Cats

According to Zodiacpet.com, fleas can lay up to 50 eggs a day, which can quickly cause an infestation inside homes and on pets. To prevent your cat from suffering painful itching and possibly contracting diseases spread by bugs, felines should be treated with topical flea medications every 30 days throughout late spring, summer and early fall. When purchasing flea medicines, be sure only to use medications intended for cats. Never give a cat topical flea medicine with the active ingredient Permetherin, as this could cause stroke or even death in the treated pet.

  1. Advantage Once-a-Month

    • Advantage kills 98 to 100 percent of present fleas within 12 hours of application. For the next four weeks Advantage kills new fleas within two hours of contact with the treated feline. This medication uses the active ingredient Imidacloprid.

    Frontline Plus

    • Frontline Plus has been proven to destroy 100 percent of fleas infesting the cat's skin and fur within 12 hours of use. The active ingredient, Fipronil, remains active for four weeks and is secreted continuously to the hair and skin through oil glands under the pet's fur.

    Hartz Ultra Guard Pro

    • Hartz contains the active ingredient Methoprene, which kills existing fleas and prevents further infestation for 30 days. Contact with a medicated cat kills fleas, ticks, mosquitoes, flea eggs and larva.

    Bio Spot

    • Bio Spot for Cats repels and destroys fleas and ticks for one month. Available over the counter for various cat sizes, this topical flea medication also actively conditions cats' coats. The active ingredients used in Bio Spot are Methoprene and Etofenprox.

    Zodiac Spot On Plus

    • Zodiac is available for cats of various sizes. Each one-month dose effectively kills fleas, ticks and mosquitoes, and prevents larva and eggs from reproducing. Methoprene and Etofenprox are the active ingredients used in this product.