Profender for Cats breaks the life cycle by killing larvae, immature adult and adult intestinal worms and lungworm before they have a chance to cause serious damage or spread. Tableting a cat can be difficult - Profender eliminates this step by providing a pre-measured, spot-on applicator to make treating your cat a breeze. Simply apply Profender to the skin at the back of your cat's head to be sure they're getting thea required dose.