: You cannot buy it over-the-counter; a licensed veterinarian must authorize the purchase.

You can purchase Trifexis directly from your vet or through authorized online pet pharmacies. Major retailers include: TRIFEXIS™ - DailyMed

: Before starting Trifexis, your dog must be tested for existing heartworm infections. Administering the drug to a heartworm-positive dog can cause serious complications.

Buy Trifexis Page

: You cannot buy it over-the-counter; a licensed veterinarian must authorize the purchase.

You can purchase Trifexis directly from your vet or through authorized online pet pharmacies. Major retailers include: TRIFEXIS™ - DailyMed buy trifexis

: Before starting Trifexis, your dog must be tested for existing heartworm infections. Administering the drug to a heartworm-positive dog can cause serious complications. : You cannot buy it over-the-counter; a licensed