Most owners purchase directly from their vet's office during a wellness exam to ensure immediate protection.

If you are looking for a more budget-friendly version, MilbeGuard is an FDA-approved generic equivalent that also requires a prescription. The Prescription Process Heartworm Test: Before a vet can prescribe Interceptor

Interceptor Plus Prevention for Heartworm + 4 Other ... - PetMeds

You can find Interceptor at the pharmacies of stores like Walmart or through specialized veterinary discount platforms like GoodRx .