Can Tri-Heart® Plus tablets be given to a dog that has heartworms or that is heartworm positive?
No. Tri-Heart® Plus is labeled for use in dogs to prevent heartworm disease and not for the treatment of heartworm infections. The package insert contains a precautionary statement that “Infected dogs must be treated to remove adult heartworms and microfilariae before initiating a program with Tri-Heart® Plus flavored chewable tablets”.