Continuously breaks the parasite lifecycle, stopping parasite damage before it starts Pyrantel tartrate, the active ingredient in Continuex, provides constant protection against 18 species and stages of large strongyles, small strongyles, roundworms, ascarids and pinworms Very palatable and easy to feed. Just top dress or mix in with your horse's daily grain ration Safe for horses of all ages, including foals, mares and stallions Studies suggest a daily dose of pyrantel tartrate may help decrease the risk of colic Available in the following sizes: 10 lb. bucket (80 day supply for 1,000 lb. horse) 25 lb. bucket (200 day supply for 1,000 lb. horse) 50 lb. bucket (400 day supply for 1,000 lb. horse)