Panacur PowerpacPanacur Powerpac (fenbendazole paste) provides larvicidal killing action for optimum parasite control. It has a high degree of efficacy against the predominant internal parasites in horses large and small strongyles including larval stages, pinworms, and ascarids for most effective treatment. For best results, use in all newly arrived horses and then once or twice per year. Convenient, oral administration and unique apple cinnamon flavor make it easy