Heartworm is a dangerous condition and difficult to treat.
Orthodox veterinary medical practitioners normally recommend Arsenic treatment at frightfully expensive prices and then hope for the best.
My recommended treatment is based on a concentrated extract of the herb Wormwood and a homeopathic nosode which is specific for the treatment of Heartworms. (I also then hope for the best)
The mix includes Wormwood along with the Bach Flowers Crab Apple and Walnut.
If being used as a preventative program, the recommended dose is to give 20 drops twice daily, mixed with feed, for two weeks to start with. Afterwards, 5 to 10 drops (depending on the size of your dog) twice per week as a preventative program.
If using the program as a treatment for an acute case you should give 20 drops twice daily continuously and monitor symptoms, reporting back to me at intervals.