Profender is a topical parasite control solution for cats. It treats and controls infections of hookworms, roundworms, and tapeworms, all of which can prove hazardous to your cat's health should an infection go untreated. Because it is a topical medication, it is easy to use and easy to apply. This particular package is designed for small cats at least eight weeks of age and weighing between 11-17.6 pounds. You will need a prescription from your veterinarian in order to purchase this product.