Revolution is an easy–to–administer, all–in–one flea and heartworm treatment for dogs and cats that simply works inside and out for a full month Protection from fleas, heartworm, ear mites, hookworm (with canex for dogs), roundworm (with canex for dogs), whipworm (with canex - dogs only), tapeworm (with canex - dogs only) and sarcoptic mange (dogs only). Once applied; Revolution is quickly absorbed into your pet’s bloodstream, skin and hair, killing fleas, heartworm and other nasties that are harmful to your pet. Revolution will then protect your pet for an entire month. Dosage and administration_Once a month, simply squeeze Revolution out and onto the skin just in front of your cat or dog's shoulder blades. Two hours later, your pet will receive protection against fleas (including their eggs and larvae), heartworm, and other parasites for the next 30 days. In the event you bathe your pet two hours after applying Revolution, rest assured knowing Revolution will be unaffected, remaining completely effective.