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Does my puppy need a vet to administer heartworm prevention?

Updated On September 23rd, 2025

Does a vet have to give puppies heartworm prevention?

2 Answers

Most Helpful Answer

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Answered By Maria DVM

Veterinarian

Published on February 18th, 2018

I do recommend monthly heartworm prevention starting at 8 weeks of age. It is a prescription so a veterinarian does not have to personally give the pill but you need to either buy it from a vet or get a prescription from a vet. The only medication that needed to be at a veterinarian's office is Pro-heart. This is an injectable heartworm prevention that lasts for 6 months. Thank you for using Petco Pet Education Center, formerly Petcoach.

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    Answered By Dr. Elizabeth

    Veterinarian

    Published on April 7th, 2019

    Heartworm prevention can be started at any age. While some parts of the country have heart worms year-round, other parts only have a heartworm season. A local veterinarian is the best person to answer your question as to when to start the prevention. Typically the prevention requires one visit for a heartworm test (a blood test). Prevention is a tablet given once a month. As long as you give the tablet each month you will not need to repeat a heartworm test until the next year. The test must be done once a year to sell the prevention. You do not require a visit every time you get the heartworm preventative unless your pet is growing. Then you just need to get her weight so you can get the correct size tablet. Adult dogs can also get an injectable product that last six months. This must be administered by the veterinarian. I hope this answers your questions and please feel free to post any additional questions.

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