: It is safe for dogs and puppies at least 8 weeks old and weighing 5 pounds or more.

: 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

: 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

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

ComboGuard is a prescription, beef-flavored chewable tablet for dogs that provides broad-spectrum protection against fleas, heartworms, and intestinal parasites like roundworms, hookworms, and whipworms. How to Buy ComboGuard ComboGuard Go to product viewer dialog for this item.

: A licensed veterinarian must issue a prescription based on your dog's current weight. Purchase Locations : In-Clinic : Many clinics, specifically VCA Animal Hospitals ComboGuard