There is still a lot of controversy over whether or not to buy a heartworm medicine or not. Personally I am in no doubt that the risks are too great so we really do need to ensure that we keep our pets safe and protected by giving them a monthly does of a heartworm medication.
With so many on offer we can all choose one that reflects our budget. There are actually a surprising number of very cheap options that are now available. From the generics like Nuheart to Heartgard Plus heartworm medicine, we can take our pick. I simply use Nuheart as not only is it the cheapest but it is the only option that can be dissolved in water. It makes it the easiest option to give as the animals never even know that they are being medicated.
I give it every month of the year so that my pets stay totally protected and there is not even the slightest risk of them getting heartworms. And this is what is recommended if you want to be totally sure that your pet really is going to stay totally safe and never get adult heartworms.