The first and only product that provides extensive protection guaranteed to protect your dog against heartworm and to treat and control multiple species of common and potentially zoonotic roundworms, hookworms and tapeworms. No other product provides monthly prevention for heartworm disease and the treatment and control for roundworms, hookworms and tapeworms. Just one IVERHART MAX® Chewable Tablet monthly gives your dog the most complete protection available. Easy to give. Dogs love the chewable tablet and IVERHART MAX® is conveniently packaged in four weight ranges.