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Step 1
Discuss with the vet which product is the best for your pet.There are several brands of heartworm medication, including Heartgard, Interceptor and Sentinel, which also includes a flea-control component. Most owners choose monthly chewable tablets, although other preventive treatments, including a new six-month injection for dogs, are available.
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Step 2
Ask the vet for a written prescription for the appropriate heartworm medication.
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Step 3
Choose an online vendor for heartworm medication, such as 1-800-PetMeds, or a mail order pet-supply company such as Drs. Foster and Smith. A legitimate vendor will require a prescription. Choose a company that has a substantial online presence and excellent online reviews.
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Step 4
Send the prescription to the vendor by mail or fax. The vet can also fax the prescription to the online vendor. Some vendors will contact the vet directly to obtain the prescription, but it is more efficient to do this yourself the first time to avoid miscommunications between the vendor and your vet.
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Step 5
Once the prescription is on file, you can reorder for one year. After that, you must get a new, current prescription.








