Use of Ivermectin in Horses

This is a paste, for oral use, containing 1.87% w/w ivermectin. In the United States, it is available in a prefilled syringe, calibrated so that each increment represents the amount of drug needed for 250 lb (114 kg) of body weight at the rate of 200 μg/kg. Each syringe contains enough paste to treat one mature horse. The syringe sold in international markets is calibrated to deliver the amount of drug needed for 100 kg (220 lb) of body weight at 200 μg/kg.