KILVERM Oral Drench contains Levamisole, a member of the imidazothiazole (clear) group of drenches, is effective in cattle and sheep against levamisole-susceptible strains of the following species. Mature and immature Barber's pole worm (Haemonchus spp), Stomach hairworm (Trichostrongylus axel). Thin necked intestinal worm (Namatodirus spp), Strongyloides Nodule and large bowel worm (Oesophagostomum spp). Small brown stomach worm (Ostertagia spp). Black scour worm (Trichostrongylus spp). Small intestinal worm (Cooperia spp). Hookworm (Bunostomum spp). Large lungworm (Dictyocaulus spp).