Vetsupply: Panoramis Chewable Tablets - Monthly Flea, Heartworm and Intestinal Worm Control Tablets. One treatment for multiple parasites. It starts action within 30 minutes and destroys 100% adult flea population within just 4 hours. It kills adult fleas before they lay eggs and thus prevents future infestations. It is easy to administer oral treatment and eliminates issues caused by spot-on treatments. Treats and controls all major types of intestinal worms.