(Merial) For treatment and control of roundworms, lungworms, grubs, sucking and biting lice, mange mites and horn flies in beef and dairy cattle, including lactating dairy cattle. No meat withdrawal or milk withholding period. For use on cattle 8 weeks of age and older. Dosage is 1 ml for each 22 lbs. body weight. Apply to the backline from the withers to tailhead. Weather conditions, including rainfall do not affect efficacy of eprinex. Squeeze measuring dispenser included with 250 ml and 1000 ml sizes.