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I have the box and 3 months worth of Sentinel left from the years supply I bought last time-it does say on the box that it's suppose to remove and control adult roundworms. I give him his heartworm meds regilously on the 1st of the month every single month, and have been doing so since he was about 10 weeks old.
Sentinel is given once a month for the prevention of heartworm disease in dogs. Sentinel also protects against hookworms, roundworms, and whipworms. Sentinel is also used to control fleas by preventing the development of flea eggs. Sentinel does not kill adult fleas.