Iverhart Max Chew for Dogs, 6-12 lbs, (Purple Box), slide 1 of 1

Iverhart Max Chew for Dogs, 6-12 lbs, (Purple Box), 6 Chews (6-mos. supply)

Prescription Item

  • Price:

    $35.53 FREE Shipping over $49

Autoship: &Save

$33.75(Save an extra 5%)

Simply select Autoship at checkout for easy regular deliveries.

Why Autoship?
  • FREE access to chat with licensed vets 7 days a week
  • Save 5% on all future Autoship orders.
  • No fees, no commitments - cancel Autoship anytime.
In stock

This item requires prescription approval. Details

Medications ship separately. Delivery times may vary. Details

Add to Cart

We'll collect your pet's prescription information at Checkout.

cw-icon-heart Created with Sketch. Add to Favorites

For use in animals only. Your furry friend must have a current heartworm test result on file with your veterinarian in order to be prescribed heartworm medication. Please visit your veterinarian to have this test performed annually to protect your four-legged friend. Help protect your pet from pesky pests with Iverhart Max Chews. These chews are formulated to help prevent heartworm disease and can also help treat and control the other three most common worms—roundworms, hookworms and tapeworms. This broad-spectrum medication helps to provide safe and effective year-round protection when given monthly and is intended for dogs 8 weeks or older weighing 6 to 12 pounds. To top it all off, it has a drool-worthy bacon flavor that your dog will love.

Proudly sourced directly from the manufacturer or their approved distributor. Guaranteed genuine and backed by the manufacturer.


Used to prevent heartworm disease by eliminating the tissue stage of heartworm larvae for a month (30 days) after infection and for the treatment and control of roundworms, hookworms, and tapeworms.

Possible Side Effects

Please contact your veterinarian if the following adverse reactions occur: depression/lethargy, vomiting, anorexia, diarrhea, mydriasis, ataxia, staggering, convulsions, and hypersalivation.

Drug & Food Interactions

Talk to your veterinarian about any other drugs your pet is taking before starting this medication.


All pets should be tested for existing heartworm infection before starting treatment, which is not effective against adult heartworm. Infected pets must be treated to remove adult heartworms and microfilariae before initiating a program with this medication. While some microfilariae may be killed, this medication is not effective for microfilariae clearance. Keep this and all drugs out of the reach of children. In case of ingestion, contact your physician immediately. Physicians may contact a Poison Control Center. Keep this and all drugs out of the reach of children.

Dosage Chart

Color on BoxWeight RangeStrengthDosageProduct Page
Purple6-12 lbs34 mcg Ivermectin, 28.5 mg Pyrantel Pamoate & 28.5 mg PraziquantelAdminister orally once a month✓-Click Here
Blue12.1-25 lbs 68 mcg Ivermectin, 57 mg Pyrantel Pamoate & 57 mg PraziquantelAdminister orally once a month✓-Click Here
Green25.1-50 lbs136 mcg Ivermectin, 114 mg Pyrantel Pamoate & 114 mg PraziquantelAdminister orally once a month✓-Click Here
Brown50.1-100 lbs272 mcg Ivermectin, 228 mg Pyrantel Pamoate & 228 mg PraziquantelAdminister orally once a month✓-Click Here

Shop Veterinary Diet Food, Supplements, Dental Care & More alt text

  1. Package Insert

See all items by Iverhart Max

  • Item Number
  • Common Brand Name(s)
    Iverhart Max
  • For Use With
  • Generic Name
    Ivermectin, Pyrantel Pamoate, Praziquantel
  • Administration Form
  • Breed Size
    Extra Small & Toy Breeds, Small Breeds
  • Product Form
  • Strength
    34 mcg Ivermectin, 28.5 mg Pyrantel Pamoate and 28.5 mg Praziquantel
  • Health Condition
    Tapeworms, Roundworms, Hookworms, Heartworms
  • Drug Type

34 mcg Ivermectin, 28.5 mg Pyrantel Pamoate and 28.5 mg Praziquantel.

Recommended Dosage

Consult your veterinarian for proper dosing instructions.

Storage Instructions

Store at controlled room temperature of 68° - 77°F. Protect product from light.


What is the recommended age for Iverhart Max Chew?

Puppies and dogs 8 weeks of age and older.

Is Iverhart Max Chew labeled for use in pregnant dogs?

No. The safe use of this product has not been evaluated in pregnant or lactating dogs.

Does a dog need to chew Iverhart Max Chew?

No. The chew can be offered by hand or added, intact, to a small amount of dog food. Care should be taken to ensure that the dog consumes the complete dose.

What if a dog vomits soon after giving Iverhart Max Chew or if the owner is not sure the entire dose was consumed?

Per the label, “if it is suspected that any of the dose has been lost, redosing is recommended.”

Is Iverhart Max Chew labeled for whipworms?

No. The labeled indications for this product includes certain species of hookworms, roundworms and tapeworms.

Does Iverhart Max Chew contain any beef?

No, Iverhart Max Chew contains hydrolyzed poultry liver as part of the bacon flavor palatability enticer. There are no beef or pork proteins in the product, only poultry.

Are there any additional animal proteins other than the hydrolyzed poultry liver in the Iverhart Max Chew?

No, there are no other animal proteins.

Are there any grains present in Iverhart Max Chew?

No whole grains are used in the production of Iverhart Max Chew. The sucrose, corn starch, croscarmellose sodium and magnesium stearate are all plant based. Corn oil and soybean oil are also present in the chews.

Can Iverhart Max Chew be promoted as hypoallergenic in dogs allergic to chicken as it contains hydrolyzed poultry liver?

No, while the poultry protein in this product is hydrolyzed, there is no information or studies to show whether it may or may not trigger an allergic reaction in patients that are allergic to chicken. There is no information as to the molecular weight ranges for the poultry protein in Iverhart Max Chew.

Are the active ingredients in Iverhart Max Chew evenly distributed throughout the chew?

Yes, the active ingredients are evenly distributed throughout the chew. By necessity to pass quality tests for release, ingredients must be evenly dispersed throughout each batch and, therefore, each chew. It is off label use to split the chew and is not recommended.

What is the shelf-life for Iverhart Max Chew?

The shelf-life for Iverhart Max Chew is 30 months from the date of manufacture.

Can Iverhart Max Chew be used in cats?

No. Iverhart Max Chew is indicated for use in dogs only according to label directions.

Rating: 5.0 of 5 stars 6 Reviews 6 Reviews 5 out of 5 Stars

Filter reviews by star rating

100% Recommend

100% of reviewersrecommend this product

Rating: 5.0 of 5 stars 5 / 5

You've Already Reviewed This Item

6 Reviews

Showing 6 Reviews

  • 5 out of 5 stars


    By NORMA on Jul 22, 2021


    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars


    By Mjcs on Jan 2, 2021

    I was able to get the same size medicine for both dogs.

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    heartworm prevention

    By madmaggie on Jul 19, 2020

    product was described in detail and further information was EASILY obtained from the manufacturer. chewy has wonderful customer service is prompt deliveries. a win win situation with everybody happy, even the dog.

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    Same item I get at Vet

    By Pookie on Jun 16, 2020

    So convenient to be able to have this shipped. Chewy contacts my Vet and the prescription is faxed to Chewy. I only had to provide my Vet’s info.

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars


    By BUBBA on May 6, 2020

    I use this on my dog, it was the one my vet ask me to use. He love it and has had no problems what so ever. Nice product.

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    My Chinese Crested Actually LOVES her Heartworm Meds

    By LWLNP on Feb 27, 2019

    My vet recommended this product to us for my 7 lb chinese crested Poppy. To my surprise she really enjoys the taste and will eat it within seconds. I have never had a dog like their heartworm preventative. So happy this was recommended to us and my Poppy likes it. Chewy.com has a great price on it as well. Thanks Chewy

    You liked it! Something went wrong. Please try again later. Report