Cydectin Pour-on 500mL is used for the treatment of infections and infestations due to internal and external parasites of beef and dairy cattle. It helps to fight against gastrointestinal roundworms, lungworms, cattle, grubs, mites, lice, and horn flies in cattle. Use 0.5mg per 2.2lb of body weight. Cydectin comes with a 100-day guarantee against disease caused by either gastrointestinal roundworms or lungworm and a 180-day lice control satisfaction guarantee. Comes in a 5ml container.