Bimectin Pour On is a convenient pour-on solution for the control of a range of external and internal parasites in cattle. Bimectin Pour On contains 5mg/ml of ivermectin and penetrates quickly, to reach and kill indicated parasites. Withdrawal period Cattle Meat and Offal -31 days Milk - Not permitted for use in lactating cattle producing milk for human consumption. Do not use in non-lactating dairy cows, including pregnant dairy heifers, within 60 days of calving.