Heartgard Chewables are a flavored treatment for dogs given once a month to prevent heartworms. Heartgard Chewables require a prescription from your veterinarian.
Looking to also control and treat roundworms and hookworms? Use Heartgard Plus Chewables.
Dogs (6 weeks of age or older and no weight requirement)
Heartgard prevents heartworm disease by eliminating the tissue stage of heartworm larvae for a month after infection.
Studies have indicated that certain dogs of the herding breeds are more sensitive to the effects of ivermectin administered at elevated dose levels due to the MDR1 gene. For a full list of dog breeds that may be affected, click here.
Can cause sensitivities in herding dog breeds. It is important that you give your pet this preventative every month. If you miss more than two monthly doses, we recommend calling your vet before continuing the medication. Also, note that side effects are rare at the recommended heartworm prevention dose. Higher doses in dogs may cause tremors, dilated pupils, loss of body weight, and death. Side effects in cats include agitation, loss of appetite, staggering, dilated pupils, tremors, blindness and disorientation.
Heartgard Chewable (Merial)
Heartgard Chewable is a prescription medication available for dogs as beef flavored chewable tablets. The usual dose of Heartgard Chewable for dogs up to 25 pounds is 68mcg (blue box), for dogs 26-50 pounds is 136mcg (green box) and for dogs 51-100 pounds is 272mcg (brown box). The chewable tablets must be chewed and should not be swallowed whole. For dogs that normally swallow whole, the chewable tablets can be broken into pieces.
Heartgard chewable is given once a month for the prevention of heartworm disease in dogs. It is recommended by the American Heartworm Society that heartworm prevention be used year round. Heartgard may also be used for purposes other than those listed in this guide.
Tell your veterinarian if your pet has ever had an allergic reaction to Heartgard, ivermectin, or to beef.
Give Heartgard exactly as directed by the veterinarian. If you do not understand the directions ask the pharmacist or veterinarian to explain them to you. Heartgard chewable tablets must be chewed. They should not be swallowed whole. Use with caution, Collies and other herding dog breeds have been known to have adverse reactions to ivermectin administered at elevated dose levels. Heartworm testing should be performed prior to the start of prevention therapy. If the animal is off Heartgard Chewables for 6 months or less, start the medication and test after 6 months since microfilaria, that take 6 months to mature, will result in a positive test result. Store Heartgard chewable at room temperature. Do not remove the chew from its wrapper until ready to give the medicine. Keep this medication away from children and pets. In addition, Dog Heartgard Chewables has shown a wide margin of safety at the recommended dose level in dogs including pregnant or breeding bitches, stud dogs and puppies aged 6 or more weeks.
Give the missed dose as soon as you remember. Do not give a double dose of the medication.
Seek emergency veterinary medical treatment. Symptoms of overdose may include vomiting, diarrhea and lack of coordination in dogs.
To help with compliance and not missing a monthly dose, use the handy red heart reminder stickers included with the medication.
Side effects of Heartgard are rare at the recommended heartworm prevention dose. Higher doses in dogs may cause tremors, dilated pupils, and loss of body weight and death.
Do not give Heartgard to your pet if already taking another heartworm medication.
Your pharmacist has additional information about Heartgard written for health professionals that you may read.
Do not remove the chew from its wrapper until ready to give. Dog Heartgard Chewables must be chewed. They should not be swallowed whole. For dogs that normally swallow whole, the chewable tablet can be broken into pieces. Do not give a double dose of the medication.
Store this product at room temperature. Keep out of reach of children.