March 4, 2026

Can You Get Flea, Tick, and Heartworm Prevention Online?

Written By
Vivian Graves
Reviewed By
Dr. Scott Perry, DVM
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Yes, you can get flea, tick, and heartworm prevention online through licensed veterinarians. Most preventatives require a prescription, which means a vet needs to evaluate your pet first. Once you have an active prescription, refills can often be managed through online platforms.

Key Takeaways

• Most flea, tick, and heartworm preventatives are prescription medications that require veterinary approval
• Online vets can prescribe these medications after reviewing your pet's health history and current status
• Heartworm prevention typically requires a negative heartworm test within the past year
• Refills can be handled online as long as your pet remains under active veterinary care

What You Need for a Prescription

Getting a prescription for parasite prevention involves a few basic requirements. Your pet needs to be established with a veterinarian, which usually means they've had an exam within the past year. For heartworm prevention specifically, most vets require proof of a negative heartworm test before writing or renewing a prescription.

This isn't just paperwork. Heartworm treatment is expensive and difficult, so confirming your pet is negative before starting prevention protects them. Some online vet services can review recent test results from your regular vet or coordinate testing through local partners.

The good news is that once you have an active prescription, the process gets simpler. Many pets stay on the same prevention year after year, and refills become routine.

What These Medications Actually Cover

Not all preventatives cover the same parasites. Some products target fleas and ticks only. Others prevent heartworm disease but don't address external parasites. Combination products exist that cover multiple types of parasites in one dose.

Your vet will recommend specific products based on where you live, your pet's lifestyle, and any existing health conditions. A dog who hikes frequently in wooded areas has different needs than one who stays mostly indoors. Online vets ask about these details during consultations to match your pet with appropriate prevention.

Some medications come as monthly chewables. Others are topical treatments applied to the skin. A few are given as injections that last several months. The format matters for compliance, especially if your pet is picky about pills or has skin sensitivities.

How Online Vets Manage Compliance and Refills

Online veterinary services handle prescriptions the same way traditional clinics do. They're required to follow state veterinary practice laws, which means establishing a valid veterinarian-client-patient relationship before prescribing.

Many platforms make refills straightforward. You can request a refill through an app or website, and the vet reviews your pet's records to confirm everything is current. If your pet is due for an exam or updated heartworm test, the vet will let you know before approving the refill.

Some services send reminders when you're running low on prevention. Others offer subscription options that ship medications automatically. These systems help you stay consistent, which matters because gaps in prevention can leave your pet vulnerable.

How Otis Can Help

Otis connects you with licensed veterinarians who can review your pet's health history and prescribe appropriate flea, tick, and heartworm prevention. Our vets evaluate each pet individually and can coordinate with your existing vet if needed for test results or medical records.

We handle refills through our platform and can set up reminders so you don't run out. If your pet needs an updated heartworm test or has health changes that affect their prevention plan, our team will walk you through next steps. Getting the protection your pet needs shouldn't feel complicated.

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