Hello. Why do you need to inject the ivermectin?
Usually it is only used orally as a heartworm preventative and under the supervision of a vet to treat certain forms of mange.
ETA: There are some dogs/breeds that cannot take ivermectin due to a genetic differences. I'll look up information and post a link for you on that specific problem.
Last edited by Gwenhwyfair; 10-23-2013 at 11:16 AM.