Amprolium, the active substance of Amprol 9.6 % Oral Solution is a thiamine antagonist. The anticoccidial effect of Amprolium is achieved by inhibiting the Eimeria spp. to uptake thiamine.The thiamine requirement for Eimeria spp. is, compared to animals, relative high and therefore Amproleum will cause starvation of the parasite because of thiamine deficiency. As this way is unique, Amprolium does not show cross-resistance with other anticoccidial preparations. Amprol 9.6% oral solution is a water soluble therapeutic product, which is used for the treatment of coccidiosis in poultry and calves. Poultry: Treatment of coccidiosis in broilers, replacements, laying hens, breeders and turkeys. Calves: As an aid in the treatment of coccidiosis, caused by Eimeria bovis and E. zuernii in calves.