Horse Health Ivermectin 1 Tube of Horse Health 1.87 % Ivermectin may come in cellophane wrap or in box. An medicine and boticide containing Ivermectin. This product the most worms and bots, plus the harmful migrating stages of bloodworms. 35 species and stages of worms and bots conglomerate. all 3 stages of the two most coarse bot species. six times per year for unspecific spectrum parasite prove. One syringe a 1,250 pound horse. for mares at any stage of pregnancy. No to rotate with another wormer. every additional month. active : 1.87 % ivermectin. This item is not in Canada .