PRODUCT DESCRIPTION: Recommended to be used monthly for cats, especially those in boarding environment or multi-pet household. If owner handles animals (e.g feeder, rescuer), recommended to administer on your own cat (s) even if they are strictly indoors. Always administer product behind neck, just above the shoulder blades where they cannot lick. Be careful when administering it when your cat's head is bent forward when eating, as you may accidentally put it on a lower point where they can lick it off when they straighten themselves. Product is TRIED & TESTED with our own cats. We do not administer this product on Duxty, our rescue, who has FIV, diabetes, liver and pancreas issues as selamectin is not advised for him by his vet due to his numerous medical issues. **WARNING: Stop if any effects and seek your vet's advise. All products used at your own risk.** Revolution is a safe and simple monthly topical medication used to protect your dog or cat from heartworms, fleas, and ear mites. Revolution is also used on dogs for the treatment or prevention of fleas, the American Dog Tick, ear mites, and canine sarcoptic mange. When used on cats it is also used to treat or prevent fleas, ear mites, hookworms, and roundworms. How does Revolution work? Revolution works by penetrating the skin and entering your pet's bloodstream. Concentrations of selamectin, the active ingredient, in the tissue and bloodstream prevent heartworm disease. Selamectin also redistributes into the skin from the bloodstream and kills adult fleas, American dog ticks, and ear mites, and prevents flea eggs from hatching. It is also an anthelmintic, which means it fights to expel parasitic worms. Parasites ingest the drug when they feed on the animal's blood. Revolution is safe for pregnant and lactating pets. IMPORTANT SAFETY INFORMATION: Do not use REVOLUTION on sick, weak, or underweight cats. Use only on cats 8 weeks and older. Side effects may include digestive upset and temporary hair loss at application site with possible inflammation. In people, REVOLUTION may be irritating to skin and eyes. Wash hands after use.