(Merial) LongRange contains eprinomectin, an extended-release injectable parasiticide for cattle on pastures useful for the treatment and control of roundworms, lungworms, grubs, and mites. Each ml of LongRange contains 50 mg eprinomectin, a macrocyclic lactone. One dose in the spring provides 100 to 150 days of protection from gastrointestinal roundworms and lungworms. Administer 1 ml per 110 lbs. by SQ injection in front of the shoulder. LongRange is not for use in cattle managed in feedlots or under intensive grazing. Not for use in breeding bulls, calves less than 3 months of age, or female dairy cattle 20 months of age or older. 50 mg/ml eprinomectin.