Panacur Dewormer controls pinworms, round worms, large and small strongyles in horses. It is safe for breeding stallions, foals, pregnant, and nursing mares. Ivomec is a highly effective deworming agent to protect against roundworms, lungworms, grubs, lice and mange mites in cattle and swine. Pyrantel, an antiworm medication, is used to treat roundworm, hookworm, pinworm, and other worm infections in horses.