I lived in a third world country for a while and when I returned I was motivated to take Ivermectin. Though the horse paste is cheaper, I did not trust the blend. I took 1 cc per 100 lb. injectable. I did not inject, but took orally. Have taken it a few times since, with no bad side effects. Whole villages in Africa have been treated with Ivermectin. It is relatively safe and effective.