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What are heartworms?

Heartworms are long, spaghetti-like worms that live in the major blood vessels of infected dogs. They can grow to be 10 inches in length and can lead to death in dogs if left untreated. Heartworms are spread when a mosquito that has bitten an infected dog goes on to bite a healthy dog.

Although heartworms are among the most deadly of parasites, other worms including roundworms, hookworms, and tapeworms also pose a threat to your dog’s health. Infection from these worms can cause your dog to feel weak or have diarrhea. You may even notice these worms appearing in your dog’s feces.

Fortunately, it’s easy to prevent heartworm disease and control other worm infections with monthly medication. Below are some products that Virbac has developed to protect your dog from heartworms and to control other worms. If you have questions about any of these products, be sure to talk with your veterinarian. As with any product you use on your pet, always listen to your veterinarian’s instructions and read the product label.

Our Products
SENTINEL<sup>®</sup> SPECTRUM<sup>®</sup> (milbemycin oxime/lufenuron/praziquantel)

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SENTINEL<sup>®</sup> SPECTRUM<sup>®</sup> (milbemycin oxime/lufenuron/praziquantel)

SENTINEL® SPECTRUM® (milbemycin oxime/lufenuron/praziquantel)

Protect your dog against 6 different parasites, including heartworms, roundworms, hookworms, whipworms, fleas,* and tapeworms with a tasty monthly chewable.

Dogs should be tested for heartworm prior to use. Mild hypersensitivity reactions have been noted in some dogs carrying a high number of circulating microfilariae. Treatment with fewer than 6 monthly doses after the last exposure to mosquitoes may not provide complete heartworm prevention. For complete product information refer to the product insert.

*Prevents flea eggs from hatching; is not an adulticide.


SENTINEL<sup>®</sup> (milbemycin oxime/lufenuron) <br>FLAVOR TABS<sup>®</sup>

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SENTINEL<sup>®</sup> (milbemycin oxime/lufenuron) <br>FLAVOR TABS<sup>®</sup>

SENTINEL® (milbemycin oxime/lufenuron)
FLAVOR TABS®

Protect your dog against 5 different parasites, including heartworms, roundworms, hookworms, whipworms, and fleas* with just 1 monthly dose.

Dogs should be tested for heartworm prior to use. In a small percentage of treated dogs, digestive, neurologic and skin side effects may occur. For complete product information refer to the product insert.

*Prevents flea eggs from hatching; is not an adulticide.


IVERHART MAX<sup>®</sup> (ivermectin/pyrantel pamoate/praziquantel) Chewable Tablets

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IVERHART MAX<sup>®</sup> (ivermectin/pyrantel pamoate/praziquantel) Chewable Tablets

IVERHART MAX® (ivermectin/pyrantel pamoate/praziquantel) Chewable Tablets

The first heartworm preventive to treat and control tapeworms. Also treats and controls roundworms and hookworms.

For use in dogs only. All dogs should be tested for heartworm infection before starting a preventive program. Use with caution in sick, debilitated, or underweight animals and dogs weighing less than 10 lbs. The safe use of this drug has not been evaluated in pregnant or lactating bitches. Adverse reactions following the use of ivermectin include: Depression/lethargy, vomiting, anorexia, diarrhea, mydriasis, ataxia, staggering, convulsions and hypersalivation. For complete product information refer to the product insert.

Your Questions Our Answers

My dog is allergic to certain proteins.  Can my dog take IVERHART MAX Tablets?

IVERHART MAX Tablets contain an artificial beef flavoring made from pork liver powder.  If your dog has an allergy to pork, consult with your veterinarian before use.

At what age can my dog start IVERHART MAX Tablets?

It is labeled for dogs and puppies 8 weeks of age and older.

Can a pregnant or lactating dog consume IVERHART MAX Tablets?

The safe use of this drug has not been evaluated in pregnant or lactating dogs.

What are the labeled indications for IVERHART MAX Tablets?

IVERHART MAX Tablets prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for a month (30 days) after infection and for the treatment and control of roundworms (Toxocara canis, Toxascaris leonina), hookworms (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense), and tapeworms (Dipylidium caninum, Taenia pisiformis).

For use in dogs only.  All dogs should be tested for heartworm infection before starting a preventive program. Use with caution in sick, debilitated, or underweight animals and dogs weighing less than 10 lbs. The safe use of this drug has not been evaluated in pregnant or lactating bitches. Adverse reactions following the use of ivermectin include: Depression/lethargy, vomiting, anorexia, diarrhea, mydriasis, ataxia, staggering, convulsions and hypersalivation.  For complete product information refer to the product insert.

Does an IVERHART MAX Tablet need to be chewed by a dog for it to be effective?

IVERHART MAX Tablets can be offered to the dog by hand or be added intact to a small amount of dog food.  Care should be taken that the dog consumes the complete dose, and the dog 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.


<i>IVERHART</i> PLUS<sup>®</sup> (ivermectin/pyrantel) Flavored Chewables

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<i>IVERHART</i> PLUS<sup>®</sup> (ivermectin/pyrantel) Flavored Chewables

IVERHART PLUS® (ivermectin/pyrantel) Flavored Chewables

Just one IVERHART PLUS® (ivermectin/pyrantel) Flavored Chewable given monthly protects your dog from heartworm disease and treats and controls roundworms and hookworms. This flavored chewable is tasty and safe even in puppies as young as 6 weeks.

For oral use in dogs only. All dogs should be tested for heartworm infection before starting a preventive program. In clinical trials with ivermectin/pyrantel, vomiting or diarrhea within 24 hours of dosing was rarely observed. Adverse reactions following the use of ivermectin include: Depression/lethargy, vomiting, anorexia, diarrhea, mydriasis, ataxia, staggering, convulsions and hypersalivation. For complete product information refer to the product insert

Your Questions Our Answers

At what age can my dog start IVERHART PLUS Chewables?

IVERHART PLUS Flavored Chewables are recommended for dogs 6 weeks of age and older. 

Can a pregnant or lactating dog consume IVERHART PLUS Chewables?

Ivermectin/pyrantel has shown a wide margin of safety at the recommended dose level in dogs, including pregnant or breeding bitches. 

What are the labeled indications for IVERHART PLUS Chewables?

IVERHART PLUS Chewables prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for a month (30 days) after infection and for the treatment and control of roundworms (Toxocara canis, Toxascaris leonina) and hookworms (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense).

For oral use in dogs only. All dogs should be tested for heartworm infection before starting a preventive program. In clinical trials with ivermectin/pyrantel, vomiting or diarrhea within 24 hours of dosing was rarely observed. Adverse reactions following the use of ivermectin include: Depression/lethargy, vomiting, anorexia, diarrhea, mydriasis, ataxia, staggering, convulsions and hypersalivation. For complete product information refer to the product insert.

What adverse reactions may be observed with use of IVERHART PLUS Chewables?

In clinical trials with ivermectin/pyrantel, vomiting or diarrhea within 24 hours of dosing was rarely observed. Adverse reactions following the use of ivermectin include: Depression/lethargy, vomiting, anorexia, diarrhea, mydriasis, ataxia, staggering, convulsions and hypersalivation.

Does an IVERHART PLUS Chewable need to be chewed by a dog for it to be effective?

IVERHART PLUS Chewables can be offered to the dog by hand or be added intact to a small amount of dog food. Care should be taken that the dog consumes the complete dose, and the dog 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.

What is the flavoring in IVERHART PLUS® (ivermectin/pyrantel) Flavored Chewables?

It is flavored with pork liver powder.


If you have questions about any of these products or specific concerns about your pet’s health, print out our Checkup Checklist and contact your veterinarian.