Comboguard: Buy

: Once you have a prescription, you can buy it from authorized retailers like Chewy Pharmacy , 1-800-PetMeds , or Vetsource. Critical Usage Information

: Your dog must be tested for existing heartworm infections before starting ComboGuard buy comboguard

contains prescription-strength ingredients, it cannot be purchased "over-the-counter." You must follow these steps: : Once you have a prescription, you can

: Discuss use with your vet if your dog has a history of epilepsy or seizures, as the ingredient spinosad may cause adverse reactions in these pets. Alternatives COMBOGUARD® - Vethical : Once you have a prescription