Buy Heartgard Online

Heartgard is a once-monthly heartworm preventive for dogs that is commonly supplied as flavored chewables. Heartgard can be bought online by choosing the chewable strength or weight band shown for your dog and matching it to your veterinarian’s directions. BorderFreeHealth offers U.S. delivery from Canada for pet medication orders, with product and clinic information reviewed when clarification is needed.

Heartgard Plus includes ivermectin for heartworm prevention and pyrantel for treatment and control of certain intestinal worms. The Plus version is often used when a veterinarian wants heartworm prevention along with coverage for common hookworms and roundworms. Before checkout, match the carton to your dog’s current weight, the monthly schedule, and the exact Heartgard or Heartgard Plus version your clinic recommended.

Heartgard Price and Chewable Weight Bands

Heartgard price depends on the chewable version, dog weight range, and carton quantity available at the time you order. The practical value comes from the number of monthly chewables in the carton, not just the carton price. A smaller carton may suit a growing puppy, while a larger carton can reduce how often you need a refill for an adult dog whose weight is stable.

Heartgard Plus for dogs is commonly organized by weight band. Shoppers often look for Heartgard Plus 0 25 for small dogs, Heartgard Plus 26 50 for medium dogs, and Heartgard Plus 51 100 for large dogs. Use your dog’s current weight rather than an estimate, especially for puppies, newly adopted dogs, or pets whose body condition has changed.

The product form also matters when comparing Heartgard cost. Heartgard chews are given by mouth once a month; they are not a topical flea product or an injection. Some people search for Heartgard tablets, but the familiar dog product is typically described as chewables or chews. Heartgard Plus chewables for dogs contain both ivermectin and pyrantel, so parasite coverage is different from an ivermectin-only product.

Quick tip: Weigh your dog before reordering if growth, weight loss, or weight gain could change the correct band.

How to Order Heartgard Online

To order Heartgard online, choose the Heartgard version, weight band, and carton size that match your dog’s prevention plan. If you care for more than one dog, order by each dog’s individual weight rather than assuming one carton fits the household. Dogs above a labeled range may need a veterinarian-directed approach, so do not combine chewables unless your clinic tells you to do so.

Order information may be reviewed if product, pet, or clinic details need clarification before the medication is supplied through licensed pharmacy channels. Keep recent weight records and veterinary instructions nearby when placing an order. That helps the pharmacy team align the chewable band with the information provided for the pet.

If you pay cash for pet medications, compare refill timing alongside the Heartgard price. A puppy may outgrow a band before finishing a large carton, while an adult dog may benefit from fewer reorder cycles. Prompt, express shipping may be available, but prevention is easiest when you reorder before the last monthly chewable is due.

What Heartgard Is Used For

Heartgard heartworm prevention for dogs helps protect against heartworm disease caused by Dirofilaria immitis. Mosquitoes transmit immature heartworm larvae to dogs. Ivermectin targets susceptible larval stages before they develop into adult heartworms, which can damage the heart, lungs, and nearby blood vessels.

Heartgard Plus adds pyrantel, an anthelmintic medicine used against certain intestinal worms. The Plus version treats and controls common hookworms and roundworms, making it a common part of broader parasite-control plans. Your veterinarian may still recommend fecal testing, environmental control, or a different deworming plan depending on exposure and local parasite risk.

Heartworm disease may not cause obvious early signs, which is why prevention and testing schedules matter. The Heartworm collection can help you browse related prevention categories, while your veterinarian remains the right source for testing and individualized care.

Active Ingredients and How Monthly Prevention Works

Heartgard contains ivermectin, a macrocyclic lactone antiparasitic medicine. At labeled monthly preventive dosing, ivermectin is used to kill susceptible heartworm larvae acquired during the previous month. It does not treat adult heartworm disease, so dogs should be assessed for heartworm status before prevention starts or restarts after a long lapse.

Heartgard Plus contains ivermectin plus pyrantel. Pyrantel works in the intestinal tract against labeled hookworms and roundworms. That added ingredient is why Heartgard Plus for dogs is different from heartworm-only prevention and why the exact product version matters when you reorder.

Monthly timing is part of how the medicine works. Giving the chewable late can leave a gap in protection, especially in mosquito-heavy areas or during travel. If a dose was missed, ask your veterinarian whether testing or a revised schedule is needed before simply continuing as usual.

Weight Bands, Puppies, and Pack Details

Heartgard medication for dogs is chosen by body weight, not age alone. Heartgard for puppies may be used from the labeled minimum age when a veterinarian considers it appropriate, but the puppy’s current weight determines the chewable band. Rapid growth can change the right carton before the next refill.

Heartgard Plus for small dogs usually refers to the 0-25 lb band, while Heartgard Plus for large dogs usually refers to the 51-100 lb band. Medium dogs are commonly matched with the 26-50 lb band. If your dog sits near the edge of a range, use the most recent weight and your clinic’s instructions rather than guessing.

Each chewable is intended as one monthly dose for a dog in the labeled range. The carton count reflects monthly administrations, not daily tablets. This distinction is important when calculating Heartgard cost, planning refills, and making sure every dog in the home has enough monthly prevention.

• Small dogs: Match the small-dog band to the dog’s current weight.
• Medium dogs: Reweigh if the dog is gaining or losing weight.
• Large dogs: Follow veterinary directions for dogs over a labeled range.
• Puppies: Recheck weight regularly during growth.

Monthly Use and Missed Dose Basics

Heartgard chewables are generally given once each month. Many owners pair dosing with the same calendar date, a grooming routine, or a recurring phone reminder. Watch your dog eat the full chewable, because a flavored medicine may be dropped, hidden, or shared by another pet if not supervised.

If your dog spits out part of the chewable, vomits shortly after taking it, or you are unsure whether the full dose was swallowed, contact your veterinarian or follow the product label. Do not double future monthly doses without professional direction. A replacement dose may or may not be appropriate depending on timing and the dog’s situation.

A missed month matters because heartworm prevention targets immature stages before adult worms develop. If more time has passed than expected, your veterinarian may recommend a heartworm test or a tailored restart plan. This is especially important for dogs living in or traveling to areas with heavy mosquito exposure.

• Use one reminder: Give the chewable on the same date each month.
• Watch consumption: Make sure the full chewable is swallowed.
• Track supply: Reorder before the final monthly dose.
• Record late doses: Tell your veterinarian if the schedule slipped.

Safety, Side Effects, and Monitoring

Dogs should be assessed for heartworm infection before starting prevention because adult heartworm disease requires veterinary management. Heartgard heartworm medicine is for prevention, not treatment of adult worms. Your veterinarian can advise when testing should be repeated, especially after missed doses or changes in prevention history.

Most dogs tolerate labeled monthly dosing, but side effects can occur. Contact your veterinarian if you notice vomiting, diarrhea, reduced appetite, unusual tiredness, drooling, tremors, unsteadiness, or seizures. Seek urgent veterinary help for collapse, repeated vomiting, severe neurologic signs, or any reaction that feels serious or rapidly worsening.

Some dogs may be more sensitive to macrocyclic lactones, the medicine class that includes ivermectin. Collie-type breeds are often discussed because of inherited drug-sensitivity concerns, although labeled Heartgard doses are widely used under veterinary supervision. Share any history of seizures, neurologic disease, medication reactions, pregnancy, lactation, or breed-specific concerns before starting or restarting prevention.

Why it matters: The right product, weight band, and testing schedule work together to keep prevention safe and consistent.

Interactions and Parasite-Coverage Planning

Tell your veterinarian about flea and tick products, dewormers, supplements, antibiotics, seizure medicines, and recent parasite treatments. Using more than one antiparasitic product can be appropriate, but overlapping ingredients may require closer review. Your clinic can coordinate heartworm prevention with the rest of your dog’s parasite plan.

Heartgard Plus chewables for dogs do not replace every parasite medicine. They do not provide flea or tick protection. Many households use a separate flea and tick product alongside heartworm prevention, but the best pairing depends on region, travel, age, weight, health history, and exposure to other animals.

If intestinal worms are the main concern, identify the parasite type with your veterinarian rather than choosing only by symptoms. The Hookworm Infection and Roundworm Infection collections can help you browse related categories for labeled worm coverage.

Storage, Handling, and Travel

Store Heartgard chewables in the original packaging at room temperature, away from excess moisture and direct light. Keep the carton out of reach of children and animals. Because the chewables are flavored, another pet may try to eat them if the package is left accessible.

When traveling, keep doses in the original blister or carton so the product name, weight band, and schedule stay clear. Bring your dog’s medication record if boarding, visiting a new clinic, or traveling to mosquito-heavy regions. Avoid leaving the carton in a hot car, direct sun, freezing luggage area, or damp bag.

Refill planning matters for monthly preventives. Review the shipping address and contact details before submitting an order, then allow time for processing and delivery. Keeping one reminder for dosing and another for refill timing can reduce the risk of gaps.

How Heartgard Compares With Other Dog Parasite Options

Heartgard is primarily a heartworm preventive, while Heartgard Plus adds pyrantel for certain intestinal worms. Other preventives may use different active ingredients, such as milbemycin oxime or selamectin, and may be oral or topical. The right choice depends on your dog’s weight, exposure, tolerance, and veterinarian’s prevention strategy.

Interceptor Plus is another oral parasite medication used in dogs, but it has different active ingredients and coverage. Revolution for Dog is a topical product with a different application method and parasite profile. These differences are clinically important, so avoid switching products without veterinary guidance.

Many owners also compare Heartgard with flea and tick brands because parasite prevention is often planned together. Heartgard and Heartgard Plus are not flea or tick products. To browse a broader range of animal health medicines, use the Pet Medications category and keep final product decisions coordinated with your veterinarian.

Questions to Ask Your Veterinarian Before Reordering

A short clinic conversation can prevent ordering the wrong carton. Ask whether year-round heartworm prevention is recommended where your dog lives or travels. Confirm when the next heartworm test is due, especially if any monthly dose was late or your dog was off prevention for a period of time.

Also ask whether Heartgard Plus is enough for local intestinal parasite risks and which flea or tick product should be paired with it. Puppies, seniors, pregnant or lactating dogs, and dogs with chronic conditions may need more individualized planning. If your dog is near the top of a weight band, ask how often you should reweigh before refills.

• Testing: When is the next heartworm test due?
• Weight: Is the current band still correct?
• Coverage: Are hookworm and roundworm risks adequately addressed?
• Pairing: Which flea and tick product fits this dog?
• Reaction plan: Which signs require urgent veterinary care?

Authoritative Sources

This content is for informational purposes only and is not a substitute for professional medical advice.