1.55% ivermectin and 7.75% praziquantel paste. Controls tapeworms, large strongyles, small strongyles, pinworms, ascarids, hairworms, large-mouth stomach worms, bots, intestinal threadworms, lungworms, and summer sores. Each tube treats one 1250-lb. horse. Broad-spectrum control Zimectrin Gold is a potent antiparasitic agent that is neither a benzimidazole nor an organophosphate. 7.35 g tube.