Is heartworm shot better than pill?

By Dr. John Koch

Question: I have been considering switching my dog to the new shot that prevents heartworms. It is such a hassle to give these pills each month. I understand that the shot only needs to be given once every six months. Is it just as effective as the pills?

Answer: The injection you mention is called Proheart. It is very effective, and it is becoming more and more popular with dog owners and veterinarians. All medications have a certain failure rate. The problem with pills is that people forget to give them, or the pet may spit them out when the owner is not around. Also it is known that a very small percentage of canines do not absorb the medication well from their intestinal tracts. If it is not absorbed, it is not effective.

The injection does not have to be given as often, and that is a big advantage. The injection cannot be spit out, and absorption is a virtual certainty. Some people like the fact that the oral medications aid in the prevention of other worms as well. However, the real reason for giving these drugs is to prevent heartworms. If an injection is a more workable solution to achieving this goal, then don't worry about intestinal worms. They can be handled in any of a number of other ways.

As with pills, Proheart injections must be given on a schedule if they are to be effective. Proheart must be given on time every six months. Veterinarians will send you a reminder when your pet is due. In addition, it is always good to mark your calendar as an additional memory aid. Preventing heartworms is important because the disease is so deadly and widespread in this area. Choose the method of prevention that you feel will work best for you.

Dr. Koch is a Cape Girardeau veterinarian.