iO Eprinomax Pour-on For Beef And Dairy Cattle is for the treatment and control of internal and external parasites of beef and dairy cattle and internal parasites of deer. Active Constituent: 5 mg/ml Eprinomectin Controls & Prevents: For the treatment and control of gastrointestinal roundworms (including inhibited immature Ostertagia ostertagi) and lungworm in cattle. For sucking and biting lice, sarcoptic and chorioptic mange mites, and buffalo fly in beef and dairy cattle. iO EPRINOMAX Pour-On aids in control of cattle tick (Rhipicephalus microplus). For the treatment and control of gastrointestinal roundworms and lungworm in deer.