Prescription Heartworm Prevention Medicine for Dogs

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Heartgard Plus Chew for Dogs, 51-100 lbs, (Brown Box), 6 Chews (6-mos. supply)

Rated 4.8897 out of 5 stars
1,314
$69.49Chewy Price
$78.89List Price
$66.02Autoship Price

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Heartgard Plus Chew for Dogs, up to 25 lbs, (Blue Box), 6 Chews (6-mos. supply)

Rated 4.8949 out of 5 stars
1,247
$48.59Chewy Price
$55.99List Price
$46.16Autoship Price

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Heartgard Plus Chew for Dogs, 26-50 lbs, (Green Box), 6 Chews (6-mos. supply)

Rated 4.8983 out of 5 stars
728
$59.49Chewy Price
$66.19List Price
$56.52Autoship Price

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Interceptor Plus Chew for Dogs, 50.1-100 lbs, (Blue Box), 6 Chews (6-mos. supply)

Rated 4.5857 out of 5 stars
490
$65.99Chewy Price
$62.69Autoship Price

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Tri-Heart Plus Chewable Tablet for Dogs, 51-100 lbs, (Brown Box), 6 Chewable Tablets (6-mos. su...

Rated 4.7387 out of 5 stars
310
$39.99Chewy Price

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Simparica Trio Chewable Tablet for Dogs, 44.1-88 lbs, (Green Box), 6 Chewable Tablets (6-mos. s...

Rated 4.2707 out of 5 stars
399
$180.99Chewy Price
$171.94Autoship Price

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Interceptor Plus Chew for Dogs, 25.1-50 lbs, (Yellow Box), 6 Chews (6-mos. supply)

Rated 4.6865 out of 5 stars
252
$55.99Chewy Price
$53.19Autoship Price

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Bundle: Heartgard Plus Chew for Dogs, 51-100 lbs, (Brown Box), 6 Chews (6-mos. supply) & NexGar...

Rated 4.4286 out of 5 stars
7
$209.48Chewy Price
$199.01Autoship Price

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Tri-Heart Plus Chewable Tablet for Dogs, 26-50 lbs, (Green Box), 6 Chewable Tablets (6-mos. sup...

Rated 4.642 out of 5 stars
162
$29.99Chewy Price

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Sentinel Tablet for Dogs, 11-25 lbs, (Green Box), 6 Tablets (6-mos. supply)

Rated 4.3936 out of 5 stars
188
$50.99Chewy Price

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Tri-Heart Plus Chewable Tablet for Dogs, up to 25 lbs, (Blue Box), 6 Chewable Tablets (6-mos. s...

Rated 4.6486 out of 5 stars
276
$22.99Chewy Price

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Interceptor Plus Chew for Dogs, 8.1-25 lbs, (Green Box), 6 Chews (6-mos. supply)

Rated 4.6325 out of 5 stars
302
$45.99Chewy Price
$43.69Autoship Price

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Trifexis Chewable Tablet for Dogs, 40.1-60 lbs, (Blue Box), 6 Chewable Tablets (6-mos. supply)

Rated 4.3824 out of 5 stars
204
$139.04Chewy Price
$132.09Autoship Price

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Sentinel Spectrum Chew for Dogs, 50.1-100 lbs, (Blue Box), 6 Chews (6-mos. supply)

Rated 4.2344 out of 5 stars
128
$77.99Chewy Price

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Iverhart Max Chew for Dogs, 50.1-100 lbs, (Brown Box), 6 Chews (6-mos. supply)

Rated 3.5 out of 5 stars
34
$57.81Chewy Price
$63.59List Price
$54.92Autoship Price

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Sentinel Tablet for Dogs, 51-100 lbs, (White Box), 6 Tablets (6-mos. supply)

Rated 4.6184 out of 5 stars
207
$72.99Chewy Price

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Simparica Trio Chewable Tablet for Dogs, 22.1-44.0 lbs, (Teal Box), 6 Chewable Tablets (6-mos. ...

Rated 4.4091 out of 5 stars
176
$175.99Chewy Price
$167.19Autoship Price

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Interceptor Chewable Tablet for Dogs, 51-100 lbs, & Cats, 12.1-25 lbs, (White Box), 6 Chewable ...

Rated 4.5217 out of 5 stars
46
$65.99Chewy Price
$62.69Autoship Price

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Bundle: Heartgard Plus Chew for Dogs, 26-50 lbs, (Green Box), 1 Chew (1-mo. supply) & NexGard C...

$41.28Chewy Price
$39.22Autoship Price

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Midamox Topical Solution for Dogs, 9.1-20 lbs, (Teal Box), 6 Doses (6-mos. supply)

$70.99Chewy Price
$78.16List Price
$67.44Autoship Price

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Sentinel Tablet for Dogs, 26-50 lbs, (Yellow Box), 6 Tablets (6-mos. supply)

Rated 4.4656 out of 5 stars
131
$60.99Chewy Price

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Milbehart Flavored Tablets for Dogs, 11-25 lbs, & Cats, 1.5-6 lbs, (Blue Box), 6 Flavored Table...

Rated 3.6667 out of 5 stars
3
$34.84Chewy Price
$33.10Autoship Price

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Advantage Multi Topical Solution for Dogs, 20.1-55 lbs, (Red Box), 6 Doses (6-mos. supply)

Rated 4.2973 out of 5 stars
74
$129.71Chewy Price
$123.22Autoship Price

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Trifexis Chewable Tablet for Dogs, 10.1-20 lbs, (Orange Box), 6 Chewable Tablets (6-mos. supply...

Rated 4.5421 out of 5 stars
321
$129.14Chewy Price
$122.68Autoship Price

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Sentinel Spectrum Chew for Dogs, 8.1-25 lbs, (Green Box), 6 Chews (6-mos. supply)

Rated 4.4867 out of 5 stars
113
$53.99Chewy Price

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Iverhart Plus Chewable Tablet for Dogs, 1-25 lbs, (Blue Box), 6 Chewable Tablets (6-mos. supply...

Rated 4.6857 out of 5 stars
35
$27.44Chewy Price
$30.18List Price
$26.07Autoship Price

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Simparica Trio Chewable Tablet for Dogs, 11.1-22.0 lbs, (Caramel Box), 6 Chewable Tablets (6-mo...

Rated 4.4366 out of 5 stars
213
$161.99Chewy Price
$153.89Autoship Price

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Iverhart Max Chew for Dogs, 25.1-50 lbs, (Green Box), 6 Chews (6-mos. supply)

Rated 3.3846 out of 5 stars
13
$48.97Chewy Price
$53.87List Price
$46.52Autoship Price

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Interceptor Chewable Tablet for Dogs, 26-50 lbs, & Cats, 6.1-12 lbs, (Yellow Box), 6 Chewable T...

Rated 4.5172 out of 5 stars
29
$52.99Chewy Price
$50.34Autoship Price

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Interceptor Plus Chew for Dogs, 2-8 lbs, (Orange Box), 6 Chews (6-mos. supply)

Rated 4.4844 out of 5 stars
64
$45.99Chewy Price
$43.69Autoship Price

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Midamox Topical Solution for Dogs, 3-9 lbs, (Green Box), 6 Doses (6-mos. supply)

$70.99Chewy Price
$78.16List Price
$67.44Autoship Price

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Selarid Topical Solution for Dogs, 40.1-85 lbs, (Teal Box), 6 Doses (6-mos. supply)

Rated 3.6667 out of 5 stars
3
$69.99Chewy Price
$66.49Autoship Price

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Revolution Topical Solution for Dogs, 20.1-40 lbs, (Red Box), 6 Doses (6-mos. supply)

Rated 4.5647 out of 5 stars
85
$151.99Chewy Price
$144.39Autoship Price

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Milbehart Flavored Tablets for Dogs, 2-10 lbs, (Yellow Box), 6 Flavored Tablets (6-mos. supply)...

$34.41Chewy Price
$32.69Autoship Price

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Trifexis Chewable Tablet for Dogs, 60.1-120 lbs, (Brown Box), 6 Chewable Tablets (6-mos. supply...

Rated 4.3818 out of 5 stars
275
$141.36Chewy Price
$134.29Autoship Price

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Sentinel Spectrum Chew for Dogs, 25.1-50 lbs, (Yellow Box), 6 Chews (6-mos. supply)

Rated 4.4242 out of 5 stars
66
$64.99Chewy Price

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Prescription Heartworm Prevention Medicine for Dogs

Protect your dog against the scourge of heartworms with preventative heartworm medicine. Chewy carries many types of heartworm medication for dogs, including heartworm pills, topical heartworm medications, and combination products that kill other parasites too.

Your vet is the person to ask about the best heartworm prevention for dogs. Your vet should be up to date on all the latest products available and can advise you on which ones may be best for your pup. For owners of younger dogs, it is important to ask about heartworm medicine for puppies, as younger pups need protection as well. Heartworm medication is available only by prescription, and your vet will need to perform a heartworm test before prescribing any preventatives. If your dog tests positive for heartworms, he will need to undergo heartworm treatment to eliminate the dangerous parasites.

Once your dog has tested negative for heartworms or completed heartworm treatment, he can begin the heartworm preventative regimen recommended and prescribed by his vet. You should have the option of choosing between oral heartworm medications in pill, chewable tablet or soft chew form or a heartworm preventative medicine applied as a topical. Most heartworm medicines provide protection for up to a month, and some are available as combo treatments that protect against roundworms, hookworms, tapeworms and more.

You can also choose combination products that combine heartworm medicine with prescription flea & tick medication in one easy dose for convenience. There are many options for heartworm protection and choosing the right one is important. The Chewy pet pharmacy has many medications needed to keep your pets healthy and safe, including prescription dog medicine for a variety of ailments, flea & tick medication for cats and medications for your other pets too. Shop our wide selection of heartworm medicine so you can protect your best friend 24/7.

Frequently Asked Questions about Prescription Heartworm Prevention Medicine for Dogs

How do I get dog heartworm medicine prescriptions online at Chewy Pharmacy?

Get dog heartworm medicine prescriptions online at Chewy Pharmacy by visiting your vet and talking about the different options. Your vet can perform a heartworm test, recommend a product and issue a prescription for the right preventative and dose. Then, go to Chewy.com and add the prescribed product to your cart. At checkout, you can add your dog’s info and vet contact information so Chewy can verify the prescription. That’s all you need to do to order your heartworm medications from Chewy!

What prescription dog heartworm medicine is best?

The best prescription heartworm medicine will provide year-round protection in an easy-to-administer formula. Your vet can advise you on the different options available and issue a prescription you can use to order your medicine online. Discuss whether you want just heartworm prevention or a combination product that includes dewormers, flea and tick protection, or all three in one dose. Popular brands include Heartgard, Tri-Heart Plus, Sentinel, Revolution and Interceptor Plus.

Why is dog heartworm medicine only available with a prescription?

Dog heartworm medicine is only available with a prescription because your dog needs a heartworm test to ensure he isn’t already infected first. Giving a heartworm preventative to a dog who is already infected can be dangerous or even deadly. A vet can also determine the right dosage for your pet and suggest the right products for your dog’s lifestyle, health and age.

Do dogs need heartworm medicine in the winter?

Dogs need heartworm medicine in the winter, spring, fall and summer because the danger of failing to protect them is too great. Although there are fewer mosquitos around during winter in most climates, there is still the risk of a bite and heartworm contraction. Protect your best friend year-round from heartworms for safety and peace of mind.

How do I set up Autoship for my prescription dog heartworm medicine?

Set up Autoship for your prescription dog heartworm medicine by selecting the Autoship option and choosing a delivery frequency at checkout. Once you set up Autoship, you can change or cancel it any time you want. You must have a valid prescription or remaining refills on file for Autoship pharmacy deliveries to occur. If we do not have a prescription, or if your prescription is expiring soon, one of our team members will reach out to your vet to obtain all the necessary information. You can always have your dog’s heartworm medicine on hand with Autoship from Chewy!