Albendazole is used to treat a variety of intestinal helminth parasites. It has been used for treating parasitic infections of the respiratory tract, including Capillaria aerophilia, Paragonimus kellicotti, Aelurostrongylus abstrusus, Filaroides spp., and Oslerus osleri. It is also effective for treatment of Giardia in small animals. Oxyclozanide is a salicylanilide and acts against Trematodes, bloodsucking nematodes and larvae of Hypoderma and Oestrus spp. The bolus also contains cobalt as micro elements supplements.