Caution: Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.
For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for a month (30 days) after infection .
HEARTGARD® Plus should be administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb) per kg (2.27 mg/lb) of body weight.
For dogs over 100 lb use the appropriate combination of these chewables.
Remove only one chewable at a time from the foil-backed blister card. Return the card with the remaining chewables to its box to protect the product from light. Because most dogs find HEARTGARD Plus palatable, the product can be offered to the dog by hand. Alternatively, it may be added intact to a small amount of dog food. The chewable should be administered in a manner that encourages the dog to chew, rather than to swallow without chewing. Chewables may be broken into pieces and fed to dogs that normally swallow treats whole.
Care should be taken that the dog consumes the complete dose, and treated animals should be observed for a few minutes after administration to ensure that part of the dose is not lost or rejected. If it is suspected that any of the dose has been lost, redosing is recommended.
HEARTGARD Chewables should be given at monthly intervals during the period of the year when mosquitoes (vectors), potentially carrying infective heartworm larvae, are active. The initial dose must be given within a month (30 days) after the dog’s first exposure to mosquitoes. The final dose must be given within a month (30 days) after the dog’s last exposure to mosquitoes.
When replacing another heartworm preventive product in a heartworm disease preventive program, the first dose of HEARTGARD must be given within a month (30 days) of the last dose of the former medication.
All dogs should be tested for existing heartworm infection before starting treatment with
HEARTGARD which is not effective against adult D. immitis. Infected dogs must be treated to remove adult
heartworms and microfilariae prior to initiating a program with HEARTGARD.
While some microfilariae may be killed by the ivermectin in HEARTGARD at the recommended dose level,
HEARTGARD is not effective for microfilariae clearance. A mild hypersensitivity-type reaction, presumably
due to dead or dying microfilariae and particularly involving a transient diarrhea, has been observed in clinical
trials with ivermectin after treatment of some dogs that have circulating microfilariae.
Keep this and all drugs out of the reach of children. In case of ingestion by humans, clients should be
advised to contact a physician immediately. Physicians may contact a Poison Control Center for advice
concerning cases of ingestion by humans.< /P>
HEARTGARD has shown a wide margin of safety at the recommended dose level in dogs (See
PRECAUTIONS for exceptions) including pregnant or breeding bitches, stud dogs and puppies aged 6 or more
weeks. In clinical trials, many commonly used flea collars, dips, shampoos, anthelmintics, antibiotics, vaccines,
and steroid preparations have been administered with HEARTGARD Chewables in a heartworm disease
Studies with ivermectin indicate that certain dogs of the Collie breed are more sensitive to the effects of
ivermectin administered at elevated dose levels (more than 16 times the target use level) than dogs of other breeds. At elevated doses, sensitive dogs showed adverse reactions which included mydriasis, depression,
ataxia, tremors, drooling, paresis, recumbency, excitability, stupor, coma and death. HEARTGARD
demonstrated no signs of toxicity at 10 times the recommended dose (60 mcg/kg) in sensitive Collies. Results of
these trials support the safety of HEARTGARD products in dogs, including Collies, when used as
Store between 68°F-77°F (20°-25°C). Excursions between 59°F-86°F (15°-30°C) are permitted. Protect product
from light. < /P>