ANTHELCIDE®EQ paste (oxibendazole) A Broad-Spectrum Equine Paste Dewormer ANTHELCIDE® EQ Paste safely and effectively removes and controls various internal parasites, including large strongyles, small strongyles, large roundworms, pinworms and threadworms. This broad-spectrum dewormer contains the active ingredient oxibendazole. Every horse is one of a kind, which is why the American Association of Equine Practitioners (AAEP) recommends working with your veterinarian to develop a deworming plan to fit your horse’s needs. Ask your veterinarian to conduct a fecal egg count test before purchasing a dewormer. Then evaluate your horse’s Individualized Deworming™ needs by answering a few questions on IDMyHorse.com.