The original patented recipe of ivermectin paste, called Zimecterin worming paste for horses (1.87% Ivermectin), provides parasite control for 60 species and stages of parasites in horses, almost twice as many as claimed by generic alternatives. Horse wormer that contains both an anthelmintic and a boticide is effective against largemouth stomach worms, large strongyles, tiny bloodworms, ascarids, threadworms, pinworms, hairworms, and lungworms.