Anthelmitics that have demonstrated efficacy against larval and adult ''O. equi'' in horses include ivermectin, moxidectin, fenbendazole and mebendazole. Pyrantel has demonstrated efficacy against adult stages only. | Anthelmitics that have demonstrated efficacy against larval and adult ''O. equi'' in horses include ivermectin, moxidectin, fenbendazole and mebendazole. Pyrantel has demonstrated efficacy against adult stages only. |