First Heartworm Generic Drug for Dogs Approved
FDA announced 2/17 the approval of Maryland Heights, MO-based Anzac Animal Health’s Diroban (melarsomine dihydrochloride), the first generic drug to treat heartworm disease in dogs. An agency news release said the drug is administered by deep injection into the back muscles. It is used to treat dogs with stabilized class 1 (no symptoms), class 2 (mild to moderate respiratory symptoms), and class 3 (severe respiratory symptoms) heartworm disease. It should not be used in dogs with class 4 (extremely severe respiratory symptoms) heartworm disease.
Side effects may include pain, swelling, or tenderness at the injection site, coughing/gagging, decrease in activity level, lack of appetite, fever, and vomiting, the agency said. Heartworm disease is caused by a thread-like parasitic worm called Dirofilaria immitis that lives in the heart, lungs, and associated blood vessels of an infected animal. “In dogs, the disease results in heart failure, severe lung disease, other organ damage, and death,” the release says. “Heartworm disease is only spread through the bite of a mosquito; it cannot be transmitted directly from one dog to another.”