• heartworm tablets for small dogs 6 tablets
  • heartworm tablets for small dogs 20 tablets

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Heartworm Tablets for Dogs – Small, Medium & Large | 6, 20 or 100 Tablets

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Monthly heartworm prevention for dogs

Heartworm Tablets for Small, Medium and Large Dogs

Heartworm Tablets for Dogs provide a convenient once-monthly option for helping prevent canine heartworm disease caused by Dirofilaria immitis. Choose the tablet that corresponds with your dog's current weight and select a package containing 6, 20 or 100 tablets.

Heartworms are transmitted through the bite of an infected mosquito. Monthly prevention works by eliminating susceptible immature heartworm larvae acquired during the preceding month before they can develop into adult heartworms.

Key Benefits

  • Monthly heartworm prevention for dogs
  • Three weight-specific tablet strengths
  • Small, medium and large dog options
  • Available in 6, 20 and 100 tablet packages
  • One correctly sized tablet each month
  • May be given orally or crushed into food when permitted by the product directions
  • Convenient for individual dogs and multi-dog households
  • Suitable for dogs six weeks of age and older when used according to the label

Choose the Correct Heartworm Tablet for Your Dog

Small Dogs

Up to 25 lb

For dogs weighing up to 25 lb (11.3 kg).

Give one Small Dog tablet monthly.

Available in 6, 20 or 100 tablets.

Medium Dogs

26–50 lb

For dogs weighing 26–50 lb (11.8–22.7 kg).

Give one Medium Dog tablet monthly.

Available in 6, 20 or 100 tablets.

Large Dogs

51–100 lb

For dogs weighing 51–100 lb (23.1–45.4 kg).

Give one Large Dog tablet monthly.

Available in 6, 20 or 100 tablets.

Heartworm Tablet Dosage Chart

Dog Size Weight Range Monthly Dose Package Options
Small Dogs Up to 25 lb / 11.3 kg 1 Small Dog tablet 6, 20 or 100 tablets
Medium Dogs 26–50 lb / 11.8–22.7 kg 1 Medium Dog tablet 6, 20 or 100 tablets
Large Dogs 51–100 lb / 23.1–45.4 kg 1 Large Dog tablet 6, 20 or 100 tablets
Dogs over 100 lb Over 100 lb / 45.4 kg Use the appropriate combination of weight-specific tablets according to veterinary or label directions. Combination required

Weigh your dog accurately before selecting a tablet. Do not substitute one strength for another or divide tablets unless expressly permitted by the product label or your veterinarian.

Available Package Sizes

Package Size Approximate Supply May Be Suitable For Available Dog Sizes
6 Tablets 6 monthly doses for one dog Shorter supply or first purchase Small, Medium or Large
20 Tablets 20 monthly doses for one dog Extended use or multi-dog households Small, Medium or Large
100 Tablets 100 total monthly doses Large multi-dog households, rescues or kennels Small, Medium or Large

Supply length depends on the number of dogs using the package. Each dog requires the tablet strength corresponding with that dog's weight.

How Monthly Heartworm Prevention Works

Heartworm disease begins when an infected mosquito bites a dog and deposits microscopic larvae. These larvae develop within the dog's body and can eventually mature into adult worms affecting the heart, lungs and nearby blood vessels.

A monthly heartworm preventive does not treat established adult heartworms. Its purpose is to eliminate susceptible immature larvae acquired during the previous month. Consistent monthly administration is therefore important.

Monthly reminder: Give the tablet on the same date each month and record each dose. Phone, calendar or subscription reminders may help prevent missed doses.

Directions for Use

  1. Confirm your dog's current weight.
  2. Select the Small, Medium or Large tablet for that weight range.
  3. Give one correctly sized tablet orally once each month.
  4. The tablet may be crushed into food if this is permitted by the specific product directions.
  5. Observe your dog to ensure the complete dose has been swallowed or consumed.
  6. Continue monthly treatment according to veterinary guidance.

Follow the package label and your veterinarian's instructions. Do not give additional doses to make up for a missed tablet without first obtaining veterinary guidance.

Important testing requirement: Dogs should be tested for existing heartworm infection before beginning a heartworm-prevention program. Preventive tablets do not eliminate established adult heartworms. Contact a veterinarian if your dog's heartworm status is unknown or if monthly prevention has been interrupted.

Important Safety Information

  • For use in dogs only.
  • Do not use in puppies younger than six weeks of age.
  • Choose the tablet that matches the dog's current weight.
  • Test dogs for heartworm infection before starting prevention.
  • Consult a veterinarian before use if your dog's heartworm status is unknown.
  • Tell your veterinarian about all medications and supplements your dog receives.
  • Seek veterinary assistance if vomiting, diarrhea, weakness, incoordination, tremors or other unusual signs occur after administration.
  • Keep tablets out of reach of children and animals.
  • Do not use the product in humans.

According to applicable product directions, monthly ivermectin heartworm-prevention tablets may be used in pregnant or breeding females, stud dogs and puppies six weeks of age or older. Always confirm this information on the label of the exact product supplied.

Storage

  • Store below 30°C (86°F), unless the package states otherwise.
  • Keep in a cool, dry location away from excess heat and moisture.
  • Keep the container securely closed.
  • Retain the original label and packaging.

Frequently Asked Questions

Which Heartworm Tablet does my dog need?

Select Small for dogs up to 25 lb, Medium for dogs weighing 26–50 lb, or Large for dogs weighing 51–100 lb. Dogs over 100 lb require an appropriate combination determined according to the product label or veterinary guidance.

How often are the tablets given?

Give one correctly sized tablet once each month, following the product label and your veterinarian's directions.

What package sizes are available?

Small, Medium and Large Dog tablets are each available in packages of 6, 20 or 100 tablets.

How long will each package last?

For one dog, 6 tablets provide six monthly doses, 20 tablets provide twenty monthly doses, and 100 tablets provide one hundred monthly doses. The supply will last for a shorter period when shared among multiple dogs.

Can the tablet be crushed into food?

It may be crushed into food when allowed by the product directions. Make sure the dog consumes the entire portion so the complete dose is received.

Can I split a Large Dog tablet for a smaller dog?

Do not divide or substitute tablet strengths unless the product label or your veterinarian specifically directs you to do so. Use the strength intended for your dog's weight.

Can puppies take Heartworm Tablets?

These tablets are intended for dogs six weeks of age or older when used according to the applicable product label. Consult a veterinarian before starting a puppy on heartworm prevention.

Can they be used in pregnant or breeding dogs?

Applicable ivermectin tablet directions indicate use at the recommended heartworm-prevention dose in pregnant or breeding females and stud dogs. Confirm the directions for the exact product supplied and consult your veterinarian when appropriate.

Should my dog be tested before starting?

Yes. Dogs should be tested for existing heartworm infection before beginning a prevention program. Your veterinarian can advise on testing and an appropriate prevention schedule.

What should I do if a monthly dose is missed?

Contact your veterinarian for guidance, particularly when prevention has been interrupted for an extended period. Do not give two doses at once unless a veterinarian specifically instructs you to do so.

Do these tablets treat adult heartworms?

No. Monthly preventive tablets are not an adult-heartworm treatment. A dog diagnosed with heartworm disease requires veterinary evaluation and an appropriate treatment plan.

Choose the Right Monthly Heartworm Protection

Select your dog's weight category and choose a package of 6, 20 or 100 tablets. Consistent monthly prevention, appropriate veterinary testing and correct weight-based selection are important parts of protecting your dog from heartworm disease.

Questions about selecting the correct size? Contact Pet MegaMart before ordering and we will help you review the available product options.

Product information is provided for general educational and product-support purposes and does not replace veterinary care. Always follow the label of the product received and the instructions of a licensed veterinarian.

Heartworm Tablets for Dogs – Small, Medium & Large | 6, 20 or 100 Tablets

$18.95 USD

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Is veterinary guidance recommended before using this product?

While many avian and small animal products are available without an in-person veterinary visit, proper diagnosis is important. Birds and small animals can be highly sensitive to stress, and treatment decisions should always be made carefully. We recommend consulting a licensed veterinarian to confirm the appropriate product and dosage for your animal’s specific condition.

If a prescription product is required, we can help facilitate consultation with a licensed veterinarian where appropriate.

Is this product safe for my pet?

When used according to label directions, this product is intended for animal use. Always follow the instructions carefully and review the product description for species suitability and administration guidance. If you are unsure, consult a veterinarian.

Unless specifically labeled, products are not intended for human consumption or for animals intended for meat or egg production for human consumption.

How is this product administered?

Administration instructions are provided on the product label and in the product description. Depending on the formulation, this product may be given orally, mixed in drinking water, applied topically, or added to feed. Always follow dosage guidelines carefully and consult a veterinarian if you are unsure about proper administration.

How quickly will this product ship?

Orders placed before 12:00 PM MST typically ship the same business day (Monday–Saturday, excluding holidays). We offer real-time calculated shipping rates and expedited options at checkout. We ship within the United States only.

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