A sheep drench containing ivermectin for the treatment and control of gastro-intestinal nematodes, lungworms and nasal bots of sheep. ORAMEC DRENCH at the recommended dose rate of 200 micrograms ivermectin per kg bodyweight provides effective control against the following parasites of sheep. Gastro-intestinal roundworms (adult and immature): Haemonchus contortus, Ostertagia circumcincta, Trichostrongylus spp., Cooperia spp., Nematodirus spp. including N. battus, Strongyloides papillosus, Oesophagostomum spp. and adult Chabertia ovina. Inhibited larval stages and benzimidazole-resistant strains of Haemonchus contortus and Ostertagia circumcincta are also controlled. Lungworms (adult and immature): Dictyocaulus filaria. Nasal bot (all larval stages): Oestrus ovis.