Today’s Pet meds Spotlight is on Iverhart Plus for Dogs. Iverhart Plus (ivermectin/pyrantel) is used monthly to prevent heartworms, while also controlling hookworms and roundworms in dogs 6 weeks of age and older. Iverhart Plus for dogs is the generic equivalent to Heartgard Plus. Iverhart Plus for dogs is a chewable pork liver flavored tablet, instead of the square beef flavored bullion of Heartgard Plus. A prescription from your veterinarian is required to order Iverhart Plus.