Vetrimec Pour-On endectocide (ivermectin 5 mg/mL) delivers internal and external parasite control for cattle in one convenient, low-volume application. Indicated for effective control of gastrointestinal roundworms, lungworms, cattle grubs, lice, mites and horn flies. Do not use in female dairy cattle of breeding age or calves to be processed for veal. Meat withdrawal: 48 days. Apply along the animal’s topline in a narrow strip extending from the withers to the tailhead.