Iverhart Max is a very good product and follows the same basis as Heartgard....It has a few added plus's and that is it has a medicine in it called Drontal which is a treatment for intestional worms that also includes tapeworms....I carry it at work and we are getting people who have a issue with tapeworms to switch from Heartgard to Iverheart Max....The only drawback we find is that it does not come in the little brown treat (meat) form and alot of people think their dogs like that better...but it is still a chewable tablet and I have not seen many that wont eat it especially a pup who has not had anything other such as heartgard.....So....Yes it is a great product for heartworms and intestional worms as well!!!