Amprid™ FOR CALVES 9.6% Oral Solution. Coccidiostat (amprolium) for the aid in the treatment and prevention of coccidiosis caused by Eimeria bovis and E. zuernii in calves. Use Amprid™ FOR CALVES as a drench or in drinking water as part of either a 5-Day Treatment or a 21-Day Prevention plan. There are 96 mg of amprolium in every 1 mL of Amprid™ FOR CALVES. Withdraw 24 hours before slaughter.