A creamy pink coloured aqueous suspension containing 2.5% w/v ricobendazole (albendazole oxide) for the treatment of sheep. Contains 1.8% w/v hydrated cobalt sulphate (equivalent to 3.77 mg of elemental cobalt/ml) and 0.097% w/v hydrated sodium selenate (equivalent to 0.41 mg of elemental selenium/ml) as excipients.